projects / thirdparty / openssl.git / blame
| Commit | Line | Data |
|---|---|---|
| 6aa36e8e | 1 | #! /usr/bin/env perl |
| 3c7d0945 | 2 | # Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved. |
| 6aa36e8e | 3 | # |
| a7f182b7 | 4 | # Licensed under the Apache License 2.0 (the "License"). You may not use |
| 6aa36e8e RS |
5 | # this file except in compliance with the License. You can obtain a copy |
| 6 | # in the file LICENSE in the source distribution or at | |
| 7 | # https://www.openssl.org/source/license.html | |
| 8 | ||
| e1613e7c AP |
9 | |
| 10 | # ==================================================================== | |
| 11 | # Written by Andy Polyakov <appro@openssl.org> for the OpenSSL | |
| 12 | # project. The module is, however, dual licensed under OpenSSL and | |
| 13 | # CRYPTOGAMS licenses depending on where you obtain it. For further | |
| 14 | # details see http://www.openssl.org/~appro/cryptogams/. | |
| 15 | # ==================================================================== | |
| 16 | # | |
| 17 | # ECP_NISTZ256 module for ARMv8. | |
| 18 | # | |
| 19 | # February 2015. | |
| 20 | # | |
| 21 | # Original ECP_NISTZ256 submission targeting x86_64 is detailed in | |
| 22 | # http://eprint.iacr.org/2013/816. | |
| 23 | # | |
| d38f1b39 | 24 | # with/without -DECP_NISTZ256_ASM |
| ab4f2026 AP |
25 | # Apple A7 +190-360% |
| 26 | # Cortex-A53 +190-400% | |
| 27 | # Cortex-A57 +190-350% | |
| 28 | # Denver +230-400% | |
| e1613e7c AP |
29 | # |
| 30 | # Ranges denote minimum and maximum improvement coefficients depending | |
| 31 | # on benchmark. Lower coefficients are for ECDSA sign, server-side | |
| d38f1b39 | 32 | # operation. Keep in mind that +400% means 5x improvement. |
| e1613e7c AP |
33 | |
| 34 | $flavour = shift; | |
| a5aa63a4 | 35 | while (($output=shift) && ($output!~/\w[\w\-]*\.\w+$/)) {} |
| e1613e7c AP |
36 | |
| 37 | $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1; | |
| 38 | ( $xlate="${dir}arm-xlate.pl" and -f $xlate ) or | |
| 39 | ( $xlate="${dir}../../perlasm/arm-xlate.pl" and -f $xlate) or | |
| 40 | die "can't locate arm-xlate.pl"; | |
| 41 | ||
| 42 | open OUT,"| \"$^X\" $xlate $flavour $output"; | |
| 43 | *STDOUT=*OUT; | |
| 44 | ||
| 45 | { | |
| 46 | my ($rp,$ap,$bp,$bi,$a0,$a1,$a2,$a3,$t0,$t1,$t2,$t3,$poly1,$poly3, | |
| 47 | $acc0,$acc1,$acc2,$acc3,$acc4,$acc5) = | |
| 48 | map("x$_",(0..17,19,20)); | |
| 49 | ||
| 50 | my ($acc6,$acc7)=($ap,$bp); # used in __ecp_nistz256_sqr_mont | |
| 51 | ||
| 52 | $code.=<<___; | |
| 53 | #include "arm_arch.h" | |
| 54 | ||
| 55 | .text | |
| 56 | ___ | |
| 57 | ######################################################################## | |
| 58 | # Convert ecp_nistz256_table.c to layout expected by ecp_nistz_gather_w7 | |
| 59 | # | |
| 60 | $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1; | |
| 61 | open TABLE,"<ecp_nistz256_table.c" or | |
| 62 | open TABLE,"<${dir}../ecp_nistz256_table.c" or | |
| 63 | die "failed to open ecp_nistz256_table.c:",$!; | |
| 64 | ||
| 65 | use integer; | |
| 66 | ||
| 67 | foreach(<TABLE>) { | |
| 68 | s/TOBN\(\s*(0x[0-9a-f]+),\s*(0x[0-9a-f]+)\s*\)/push @arr,hex($2),hex($1)/geo; | |
| 69 | } | |
| 70 | close TABLE; | |
| 71 | ||
| 72 | # See ecp_nistz256_table.c for explanation for why it's 64*16*37. | |
| 73 | # 64*16*37-1 is because $#arr returns last valid index or @arr, not | |
| 74 | # amount of elements. | |
| 75 | die "insane number of elements" if ($#arr != 64*16*37-1); | |
| 76 | ||
| 77 | $code.=<<___; | |
| 78 | .globl ecp_nistz256_precomputed | |
| 79 | .type ecp_nistz256_precomputed,%object | |
| 80 | .align 12 | |
| 81 | ecp_nistz256_precomputed: | |
| 82 | ___ | |
| 83 | ######################################################################## | |
| 84 | # this conversion smashes P256_POINT_AFFINE by individual bytes with | |
| 85 | # 64 byte interval, similar to | |
| 86 | # 1111222233334444 | |
| 87 | # 1234123412341234 | |
| 88 | for(1..37) { | |
| 89 | @tbl = splice(@arr,0,64*16); | |
| 90 | for($i=0;$i<64;$i++) { | |
| 91 | undef @line; | |
| 92 | for($j=0;$j<64;$j++) { | |
| 93 | push @line,(@tbl[$j*16+$i/4]>>(($i%4)*8))&0xff; | |
| 94 | } | |
| 95 | $code.=".byte\t"; | |
| 96 | $code.=join(',',map { sprintf "0x%02x",$_} @line); | |
| 97 | $code.="\n"; | |
| 98 | } | |
| 99 | } | |
| 100 | $code.=<<___; | |
| 101 | .size ecp_nistz256_precomputed,.-ecp_nistz256_precomputed | |
| 102 | .align 5 | |
| 103 | .Lpoly: | |
| 104 | .quad 0xffffffffffffffff,0x00000000ffffffff,0x0000000000000000,0xffffffff00000001 | |
| 105 | .LRR: // 2^512 mod P precomputed for NIST P256 polynomial | |
| 106 | .quad 0x0000000000000003,0xfffffffbffffffff,0xfffffffffffffffe,0x00000004fffffffd | |
| 107 | .Lone_mont: | |
| 108 | .quad 0x0000000000000001,0xffffffff00000000,0xffffffffffffffff,0x00000000fffffffe | |
| 109 | .Lone: | |
| 110 | .quad 1,0,0,0 | |
| ab4f2026 AP |
111 | .Lord: |
| 112 | .quad 0xf3b9cac2fc632551,0xbce6faada7179e84,0xffffffffffffffff,0xffffffff00000000 | |
| 113 | .LordK: | |
| 114 | .quad 0xccd1c8aaee00bc4f | |
| e1613e7c AP |
115 | .asciz "ECP_NISTZ256 for ARMv8, CRYPTOGAMS by <appro\@openssl.org>" |
| 116 | ||
| 117 | // void ecp_nistz256_to_mont(BN_ULONG x0[4],const BN_ULONG x1[4]); | |
| 118 | .globl ecp_nistz256_to_mont | |
| 119 | .type ecp_nistz256_to_mont,%function | |
| 120 | .align 6 | |
| 121 | ecp_nistz256_to_mont: | |
| 9a18aae5 | 122 | .inst 0xd503233f // paciasp |
| e1613e7c AP |
123 | stp x29,x30,[sp,#-32]! |
| 124 | add x29,sp,#0 | |
| 125 | stp x19,x20,[sp,#16] | |
| 126 | ||
| 127 | ldr $bi,.LRR // bp[0] | |
| 128 | ldp $a0,$a1,[$ap] | |
| 129 | ldp $a2,$a3,[$ap,#16] | |
| 130 | ldr $poly1,.Lpoly+8 | |
| 131 | ldr $poly3,.Lpoly+24 | |
| 132 | adr $bp,.LRR // &bp[0] | |
| 133 | ||
| 134 | bl __ecp_nistz256_mul_mont | |
| 135 | ||
| 136 | ldp x19,x20,[sp,#16] | |
| 137 | ldp x29,x30,[sp],#32 | |
| 9a18aae5 | 138 | .inst 0xd50323bf // autiasp |
| e1613e7c AP |
139 | ret |
| 140 | .size ecp_nistz256_to_mont,.-ecp_nistz256_to_mont | |
| 141 | ||
| 142 | // void ecp_nistz256_from_mont(BN_ULONG x0[4],const BN_ULONG x1[4]); | |
| 143 | .globl ecp_nistz256_from_mont | |
| 144 | .type ecp_nistz256_from_mont,%function | |
| 145 | .align 4 | |
| 146 | ecp_nistz256_from_mont: | |
| 9a18aae5 | 147 | .inst 0xd503233f // paciasp |
| e1613e7c AP |
148 | stp x29,x30,[sp,#-32]! |
| 149 | add x29,sp,#0 | |
| 150 | stp x19,x20,[sp,#16] | |
| 151 | ||
| 152 | mov $bi,#1 // bp[0] | |
| 153 | ldp $a0,$a1,[$ap] | |
| 154 | ldp $a2,$a3,[$ap,#16] | |
| 155 | ldr $poly1,.Lpoly+8 | |
| 156 | ldr $poly3,.Lpoly+24 | |
| 157 | adr $bp,.Lone // &bp[0] | |
| 158 | ||
| 159 | bl __ecp_nistz256_mul_mont | |
| 160 | ||
| 161 | ldp x19,x20,[sp,#16] | |
| 162 | ldp x29,x30,[sp],#32 | |
| 9a18aae5 | 163 | .inst 0xd50323bf // autiasp |
| e1613e7c AP |
164 | ret |
| 165 | .size ecp_nistz256_from_mont,.-ecp_nistz256_from_mont | |
| 166 | ||
| 167 | // void ecp_nistz256_mul_mont(BN_ULONG x0[4],const BN_ULONG x1[4], | |
| 168 | // const BN_ULONG x2[4]); | |
| 169 | .globl ecp_nistz256_mul_mont | |
| 170 | .type ecp_nistz256_mul_mont,%function | |
| 171 | .align 4 | |
| 172 | ecp_nistz256_mul_mont: | |
| 9a18aae5 | 173 | .inst 0xd503233f // paciasp |
| e1613e7c AP |
174 | stp x29,x30,[sp,#-32]! |
| 175 | add x29,sp,#0 | |
| 176 | stp x19,x20,[sp,#16] | |
| 177 | ||
| 178 | ldr $bi,[$bp] // bp[0] | |
| 179 | ldp $a0,$a1,[$ap] | |
| 180 | ldp $a2,$a3,[$ap,#16] | |
| 181 | ldr $poly1,.Lpoly+8 | |
| 182 | ldr $poly3,.Lpoly+24 | |
| 183 | ||
| 184 | bl __ecp_nistz256_mul_mont | |
| 185 | ||
| 186 | ldp x19,x20,[sp,#16] | |
| 187 | ldp x29,x30,[sp],#32 | |
| 9a18aae5 | 188 | .inst 0xd50323bf // autiasp |
| e1613e7c AP |
189 | ret |
| 190 | .size ecp_nistz256_mul_mont,.-ecp_nistz256_mul_mont | |
| 191 | ||
| 192 | // void ecp_nistz256_sqr_mont(BN_ULONG x0[4],const BN_ULONG x1[4]); | |
| 193 | .globl ecp_nistz256_sqr_mont | |
| 194 | .type ecp_nistz256_sqr_mont,%function | |
| 195 | .align 4 | |
| 196 | ecp_nistz256_sqr_mont: | |
| 9a18aae5 | 197 | .inst 0xd503233f // paciasp |
| e1613e7c AP |
198 | stp x29,x30,[sp,#-32]! |
| 199 | add x29,sp,#0 | |
| 200 | stp x19,x20,[sp,#16] | |
| 201 | ||
| 202 | ldp $a0,$a1,[$ap] | |
| 203 | ldp $a2,$a3,[$ap,#16] | |
| 204 | ldr $poly1,.Lpoly+8 | |
| 205 | ldr $poly3,.Lpoly+24 | |
| 206 | ||
| 207 | bl __ecp_nistz256_sqr_mont | |
| 208 | ||
| 209 | ldp x19,x20,[sp,#16] | |
| 210 | ldp x29,x30,[sp],#32 | |
| 9a18aae5 | 211 | .inst 0xd50323bf // autiasp |
| e1613e7c AP |
212 | ret |
| 213 | .size ecp_nistz256_sqr_mont,.-ecp_nistz256_sqr_mont | |
| 214 | ||
| 215 | // void ecp_nistz256_add(BN_ULONG x0[4],const BN_ULONG x1[4], | |
| 216 | // const BN_ULONG x2[4]); | |
| 217 | .globl ecp_nistz256_add | |
| 218 | .type ecp_nistz256_add,%function | |
| 219 | .align 4 | |
| 220 | ecp_nistz256_add: | |
| 9a18aae5 | 221 | .inst 0xd503233f // paciasp |
| e1613e7c AP |
222 | stp x29,x30,[sp,#-16]! |
| 223 | add x29,sp,#0 | |
| 224 | ||
| 225 | ldp $acc0,$acc1,[$ap] | |
| 226 | ldp $t0,$t1,[$bp] | |
| 227 | ldp $acc2,$acc3,[$ap,#16] | |
| 228 | ldp $t2,$t3,[$bp,#16] | |
| 229 | ldr $poly1,.Lpoly+8 | |
| 230 | ldr $poly3,.Lpoly+24 | |
| 231 | ||
| 232 | bl __ecp_nistz256_add | |
| 233 | ||
| 234 | ldp x29,x30,[sp],#16 | |
| 9a18aae5 | 235 | .inst 0xd50323bf // autiasp |
| e1613e7c AP |
236 | ret |
| 237 | .size ecp_nistz256_add,.-ecp_nistz256_add | |
| 238 | ||
| 239 | // void ecp_nistz256_div_by_2(BN_ULONG x0[4],const BN_ULONG x1[4]); | |
| 240 | .globl ecp_nistz256_div_by_2 | |
| 241 | .type ecp_nistz256_div_by_2,%function | |
| 242 | .align 4 | |
| 243 | ecp_nistz256_div_by_2: | |
| 9a18aae5 | 244 | .inst 0xd503233f // paciasp |
| e1613e7c AP |
245 | stp x29,x30,[sp,#-16]! |
| 246 | add x29,sp,#0 | |
| 247 | ||
| 248 | ldp $acc0,$acc1,[$ap] | |
| 249 | ldp $acc2,$acc3,[$ap,#16] | |
| 250 | ldr $poly1,.Lpoly+8 | |
| 251 | ldr $poly3,.Lpoly+24 | |
| 252 | ||
| 253 | bl __ecp_nistz256_div_by_2 | |
| 254 | ||
| 255 | ldp x29,x30,[sp],#16 | |
| 9a18aae5 | 256 | .inst 0xd50323bf // autiasp |
| e1613e7c AP |
257 | ret |
| 258 | .size ecp_nistz256_div_by_2,.-ecp_nistz256_div_by_2 | |
| 259 | ||
| 260 | // void ecp_nistz256_mul_by_2(BN_ULONG x0[4],const BN_ULONG x1[4]); | |
| 261 | .globl ecp_nistz256_mul_by_2 | |
| 262 | .type ecp_nistz256_mul_by_2,%function | |
| 263 | .align 4 | |
| 264 | ecp_nistz256_mul_by_2: | |
| 9a18aae5 | 265 | .inst 0xd503233f // paciasp |
| e1613e7c AP |
266 | stp x29,x30,[sp,#-16]! |
| 267 | add x29,sp,#0 | |
| 268 | ||
| 269 | ldp $acc0,$acc1,[$ap] | |
| 270 | ldp $acc2,$acc3,[$ap,#16] | |
| 271 | ldr $poly1,.Lpoly+8 | |
| 272 | ldr $poly3,.Lpoly+24 | |
| 273 | mov $t0,$acc0 | |
| 274 | mov $t1,$acc1 | |
| 275 | mov $t2,$acc2 | |
| 276 | mov $t3,$acc3 | |
| 277 | ||
| 278 | bl __ecp_nistz256_add // ret = a+a // 2*a | |
| 279 | ||
| 280 | ldp x29,x30,[sp],#16 | |
| 9a18aae5 | 281 | .inst 0xd50323bf // autiasp |
| e1613e7c AP |
282 | ret |
| 283 | .size ecp_nistz256_mul_by_2,.-ecp_nistz256_mul_by_2 | |
| 284 | ||
| 285 | // void ecp_nistz256_mul_by_3(BN_ULONG x0[4],const BN_ULONG x1[4]); | |
| 286 | .globl ecp_nistz256_mul_by_3 | |
| 287 | .type ecp_nistz256_mul_by_3,%function | |
| 288 | .align 4 | |
| 289 | ecp_nistz256_mul_by_3: | |
| 9a18aae5 | 290 | .inst 0xd503233f // paciasp |
| e1613e7c AP |
291 | stp x29,x30,[sp,#-16]! |
| 292 | add x29,sp,#0 | |
| 293 | ||
| 294 | ldp $acc0,$acc1,[$ap] | |
| 295 | ldp $acc2,$acc3,[$ap,#16] | |
| 296 | ldr $poly1,.Lpoly+8 | |
| 297 | ldr $poly3,.Lpoly+24 | |
| 298 | mov $t0,$acc0 | |
| 299 | mov $t1,$acc1 | |
| 300 | mov $t2,$acc2 | |
| 301 | mov $t3,$acc3 | |
| 302 | mov $a0,$acc0 | |
| 303 | mov $a1,$acc1 | |
| 304 | mov $a2,$acc2 | |
| 305 | mov $a3,$acc3 | |
| 306 | ||
| 307 | bl __ecp_nistz256_add // ret = a+a // 2*a | |
| 308 | ||
| 309 | mov $t0,$a0 | |
| 310 | mov $t1,$a1 | |
| 311 | mov $t2,$a2 | |
| 312 | mov $t3,$a3 | |
| 313 | ||
| 314 | bl __ecp_nistz256_add // ret += a // 2*a+a=3*a | |
| 315 | ||
| 316 | ldp x29,x30,[sp],#16 | |
| 9a18aae5 | 317 | .inst 0xd50323bf // autiasp |
| e1613e7c AP |
318 | ret |
| 319 | .size ecp_nistz256_mul_by_3,.-ecp_nistz256_mul_by_3 | |
| 320 | ||
| 321 | // void ecp_nistz256_sub(BN_ULONG x0[4],const BN_ULONG x1[4], | |
| 322 | // const BN_ULONG x2[4]); | |
| 323 | .globl ecp_nistz256_sub | |
| 324 | .type ecp_nistz256_sub,%function | |
| 325 | .align 4 | |
| 326 | ecp_nistz256_sub: | |
| 9a18aae5 | 327 | .inst 0xd503233f // paciasp |
| e1613e7c AP |
328 | stp x29,x30,[sp,#-16]! |
| 329 | add x29,sp,#0 | |
| 330 | ||
| 331 | ldp $acc0,$acc1,[$ap] | |
| 332 | ldp $acc2,$acc3,[$ap,#16] | |
| 333 | ldr $poly1,.Lpoly+8 | |
| 334 | ldr $poly3,.Lpoly+24 | |
| 335 | ||
| 336 | bl __ecp_nistz256_sub_from | |
| 337 | ||
| 338 | ldp x29,x30,[sp],#16 | |
| 9a18aae5 | 339 | .inst 0xd50323bf // autiasp |
| e1613e7c AP |
340 | ret |
| 341 | .size ecp_nistz256_sub,.-ecp_nistz256_sub | |
| 342 | ||
| 343 | // void ecp_nistz256_neg(BN_ULONG x0[4],const BN_ULONG x1[4]); | |
| 344 | .globl ecp_nistz256_neg | |
| 345 | .type ecp_nistz256_neg,%function | |
| 346 | .align 4 | |
| 347 | ecp_nistz256_neg: | |
| 9a18aae5 | 348 | .inst 0xd503233f // paciasp |
| e1613e7c AP |
349 | stp x29,x30,[sp,#-16]! |
| 350 | add x29,sp,#0 | |
| 351 | ||
| 352 | mov $bp,$ap | |
| 353 | mov $acc0,xzr // a = 0 | |
| 354 | mov $acc1,xzr | |
| 355 | mov $acc2,xzr | |
| 356 | mov $acc3,xzr | |
| 357 | ldr $poly1,.Lpoly+8 | |
| 358 | ldr $poly3,.Lpoly+24 | |
| 359 | ||
| 360 | bl __ecp_nistz256_sub_from | |
| 361 | ||
| 362 | ldp x29,x30,[sp],#16 | |
| 9a18aae5 | 363 | .inst 0xd50323bf // autiasp |
| e1613e7c AP |
364 | ret |
| 365 | .size ecp_nistz256_neg,.-ecp_nistz256_neg | |
| 366 | ||
| 367 | // note that __ecp_nistz256_mul_mont expects a[0-3] input pre-loaded | |
| 368 | // to $a0-$a3 and b[0] - to $bi | |
| 369 | .type __ecp_nistz256_mul_mont,%function | |
| 370 | .align 4 | |
| 371 | __ecp_nistz256_mul_mont: | |
| 372 | mul $acc0,$a0,$bi // a[0]*b[0] | |
| 373 | umulh $t0,$a0,$bi | |
| 374 | ||
| 375 | mul $acc1,$a1,$bi // a[1]*b[0] | |
| 376 | umulh $t1,$a1,$bi | |
| 377 | ||
| 378 | mul $acc2,$a2,$bi // a[2]*b[0] | |
| 379 | umulh $t2,$a2,$bi | |
| 380 | ||
| 381 | mul $acc3,$a3,$bi // a[3]*b[0] | |
| 382 | umulh $t3,$a3,$bi | |
| 383 | ldr $bi,[$bp,#8] // b[1] | |
| 384 | ||
| 385 | adds $acc1,$acc1,$t0 // accumulate high parts of multiplication | |
| 386 | lsl $t0,$acc0,#32 | |
| 387 | adcs $acc2,$acc2,$t1 | |
| 388 | lsr $t1,$acc0,#32 | |
| 389 | adcs $acc3,$acc3,$t2 | |
| 390 | adc $acc4,xzr,$t3 | |
| 391 | mov $acc5,xzr | |
| 392 | ___ | |
| 393 | for($i=1;$i<4;$i++) { | |
| 394 | # Reduction iteration is normally performed by accumulating | |
| 395 | # result of multiplication of modulus by "magic" digit [and | |
| 396 | # omitting least significant word, which is guaranteed to | |
| 397 | # be 0], but thanks to special form of modulus and "magic" | |
| 398 | # digit being equal to least significant word, it can be | |
| 399 | # performed with additions and subtractions alone. Indeed: | |
| 400 | # | |
| 401 | # ffff0001.00000000.0000ffff.ffffffff | |
| 402 | # * abcdefgh | |
| 403 | # + xxxxxxxx.xxxxxxxx.xxxxxxxx.xxxxxxxx.abcdefgh | |
| 404 | # | |
| 405 | # Now observing that ff..ff*x = (2^n-1)*x = 2^n*x-x, we | |
| 406 | # rewrite above as: | |
| 407 | # | |
| 408 | # xxxxxxxx.xxxxxxxx.xxxxxxxx.xxxxxxxx.abcdefgh | |
| 409 | # + abcdefgh.abcdefgh.0000abcd.efgh0000.00000000 | |
| 410 | # - 0000abcd.efgh0000.00000000.00000000.abcdefgh | |
| 411 | # | |
| 412 | # or marking redundant operations: | |
| 413 | # | |
| 414 | # xxxxxxxx.xxxxxxxx.xxxxxxxx.xxxxxxxx.-------- | |
| 415 | # + abcdefgh.abcdefgh.0000abcd.efgh0000.-------- | |
| 416 | # - 0000abcd.efgh0000.--------.--------.-------- | |
| 417 | ||
| 418 | $code.=<<___; | |
| 419 | subs $t2,$acc0,$t0 // "*0xffff0001" | |
| 420 | sbc $t3,$acc0,$t1 | |
| 421 | adds $acc0,$acc1,$t0 // +=acc[0]<<96 and omit acc[0] | |
| 422 | mul $t0,$a0,$bi // lo(a[0]*b[i]) | |
| 423 | adcs $acc1,$acc2,$t1 | |
| 424 | mul $t1,$a1,$bi // lo(a[1]*b[i]) | |
| 425 | adcs $acc2,$acc3,$t2 // +=acc[0]*0xffff0001 | |
| 426 | mul $t2,$a2,$bi // lo(a[2]*b[i]) | |
| 427 | adcs $acc3,$acc4,$t3 | |
| 428 | mul $t3,$a3,$bi // lo(a[3]*b[i]) | |
| 429 | adc $acc4,$acc5,xzr | |
| 430 | ||
| 431 | adds $acc0,$acc0,$t0 // accumulate low parts of multiplication | |
| 432 | umulh $t0,$a0,$bi // hi(a[0]*b[i]) | |
| 433 | adcs $acc1,$acc1,$t1 | |
| 434 | umulh $t1,$a1,$bi // hi(a[1]*b[i]) | |
| 435 | adcs $acc2,$acc2,$t2 | |
| 436 | umulh $t2,$a2,$bi // hi(a[2]*b[i]) | |
| 437 | adcs $acc3,$acc3,$t3 | |
| 438 | umulh $t3,$a3,$bi // hi(a[3]*b[i]) | |
| 439 | adc $acc4,$acc4,xzr | |
| 440 | ___ | |
| 441 | $code.=<<___ if ($i<3); | |
| 442 | ldr $bi,[$bp,#8*($i+1)] // b[$i+1] | |
| 443 | ___ | |
| 444 | $code.=<<___; | |
| 445 | adds $acc1,$acc1,$t0 // accumulate high parts of multiplication | |
| 446 | lsl $t0,$acc0,#32 | |
| 447 | adcs $acc2,$acc2,$t1 | |
| 448 | lsr $t1,$acc0,#32 | |
| 449 | adcs $acc3,$acc3,$t2 | |
| 450 | adcs $acc4,$acc4,$t3 | |
| 451 | adc $acc5,xzr,xzr | |
| 452 | ___ | |
| 453 | } | |
| 454 | $code.=<<___; | |
| 455 | // last reduction | |
| 456 | subs $t2,$acc0,$t0 // "*0xffff0001" | |
| 457 | sbc $t3,$acc0,$t1 | |
| 458 | adds $acc0,$acc1,$t0 // +=acc[0]<<96 and omit acc[0] | |
| 459 | adcs $acc1,$acc2,$t1 | |
| 460 | adcs $acc2,$acc3,$t2 // +=acc[0]*0xffff0001 | |
| 461 | adcs $acc3,$acc4,$t3 | |
| 462 | adc $acc4,$acc5,xzr | |
| 463 | ||
| 464 | adds $t0,$acc0,#1 // subs $t0,$acc0,#-1 // tmp = ret-modulus | |
| 465 | sbcs $t1,$acc1,$poly1 | |
| 466 | sbcs $t2,$acc2,xzr | |
| 467 | sbcs $t3,$acc3,$poly3 | |
| 468 | sbcs xzr,$acc4,xzr // did it borrow? | |
| 469 | ||
| 470 | csel $acc0,$acc0,$t0,lo // ret = borrow ? ret : ret-modulus | |
| 471 | csel $acc1,$acc1,$t1,lo | |
| 472 | csel $acc2,$acc2,$t2,lo | |
| 473 | stp $acc0,$acc1,[$rp] | |
| 474 | csel $acc3,$acc3,$t3,lo | |
| 475 | stp $acc2,$acc3,[$rp,#16] | |
| 476 | ||
| 477 | ret | |
| 478 | .size __ecp_nistz256_mul_mont,.-__ecp_nistz256_mul_mont | |
| 479 | ||
| 480 | // note that __ecp_nistz256_sqr_mont expects a[0-3] input pre-loaded | |
| 481 | // to $a0-$a3 | |
| 482 | .type __ecp_nistz256_sqr_mont,%function | |
| 483 | .align 4 | |
| 484 | __ecp_nistz256_sqr_mont: | |
| 485 | // | | | | | |a1*a0| | | |
| 486 | // | | | | |a2*a0| | | | |
| 487 | // | |a3*a2|a3*a0| | | | | |
| 488 | // | | | |a2*a1| | | | | |
| 489 | // | | |a3*a1| | | | | | |
| 490 | // *| | | | | | | | 2| | |
| 491 | // +|a3*a3|a2*a2|a1*a1|a0*a0| | |
| 492 | // |--+--+--+--+--+--+--+--| | |
| 493 | // |A7|A6|A5|A4|A3|A2|A1|A0|, where Ax is $accx, i.e. follow $accx | |
| 494 | // | |
| 495 | // "can't overflow" below mark carrying into high part of | |
| 496 | // multiplication result, which can't overflow, because it | |
| 497 | // can never be all ones. | |
| 498 | ||
| 499 | mul $acc1,$a1,$a0 // a[1]*a[0] | |
| 500 | umulh $t1,$a1,$a0 | |
| 501 | mul $acc2,$a2,$a0 // a[2]*a[0] | |
| 502 | umulh $t2,$a2,$a0 | |
| 503 | mul $acc3,$a3,$a0 // a[3]*a[0] | |
| 504 | umulh $acc4,$a3,$a0 | |
| 505 | ||
| 506 | adds $acc2,$acc2,$t1 // accumulate high parts of multiplication | |
| 507 | mul $t0,$a2,$a1 // a[2]*a[1] | |
| 508 | umulh $t1,$a2,$a1 | |
| 509 | adcs $acc3,$acc3,$t2 | |
| 510 | mul $t2,$a3,$a1 // a[3]*a[1] | |
| 511 | umulh $t3,$a3,$a1 | |
| 512 | adc $acc4,$acc4,xzr // can't overflow | |
| 513 | ||
| 514 | mul $acc5,$a3,$a2 // a[3]*a[2] | |
| 515 | umulh $acc6,$a3,$a2 | |
| 516 | ||
| 517 | adds $t1,$t1,$t2 // accumulate high parts of multiplication | |
| 518 | mul $acc0,$a0,$a0 // a[0]*a[0] | |
| 519 | adc $t2,$t3,xzr // can't overflow | |
| 520 | ||
| 521 | adds $acc3,$acc3,$t0 // accumulate low parts of multiplication | |
| 522 | umulh $a0,$a0,$a0 | |
| 523 | adcs $acc4,$acc4,$t1 | |
| 524 | mul $t1,$a1,$a1 // a[1]*a[1] | |
| 525 | adcs $acc5,$acc5,$t2 | |
| 526 | umulh $a1,$a1,$a1 | |
| 527 | adc $acc6,$acc6,xzr // can't overflow | |
| 528 | ||
| 529 | adds $acc1,$acc1,$acc1 // acc[1-6]*=2 | |
| 530 | mul $t2,$a2,$a2 // a[2]*a[2] | |
| 531 | adcs $acc2,$acc2,$acc2 | |
| 532 | umulh $a2,$a2,$a2 | |
| 533 | adcs $acc3,$acc3,$acc3 | |
| 534 | mul $t3,$a3,$a3 // a[3]*a[3] | |
| 535 | adcs $acc4,$acc4,$acc4 | |
| 536 | umulh $a3,$a3,$a3 | |
| 537 | adcs $acc5,$acc5,$acc5 | |
| 538 | adcs $acc6,$acc6,$acc6 | |
| 539 | adc $acc7,xzr,xzr | |
| 540 | ||
| 541 | adds $acc1,$acc1,$a0 // +a[i]*a[i] | |
| 542 | adcs $acc2,$acc2,$t1 | |
| 543 | adcs $acc3,$acc3,$a1 | |
| 544 | adcs $acc4,$acc4,$t2 | |
| 545 | adcs $acc5,$acc5,$a2 | |
| 546 | lsl $t0,$acc0,#32 | |
| 547 | adcs $acc6,$acc6,$t3 | |
| 548 | lsr $t1,$acc0,#32 | |
| 549 | adc $acc7,$acc7,$a3 | |
| 550 | ___ | |
| 551 | for($i=0;$i<3;$i++) { # reductions, see commentary in | |
| 552 | # multiplication for details | |
| 553 | $code.=<<___; | |
| 554 | subs $t2,$acc0,$t0 // "*0xffff0001" | |
| 555 | sbc $t3,$acc0,$t1 | |
| 556 | adds $acc0,$acc1,$t0 // +=acc[0]<<96 and omit acc[0] | |
| 557 | adcs $acc1,$acc2,$t1 | |
| 558 | lsl $t0,$acc0,#32 | |
| 559 | adcs $acc2,$acc3,$t2 // +=acc[0]*0xffff0001 | |
| 560 | lsr $t1,$acc0,#32 | |
| 561 | adc $acc3,$t3,xzr // can't overflow | |
| 562 | ___ | |
| 563 | } | |
| 564 | $code.=<<___; | |
| 565 | subs $t2,$acc0,$t0 // "*0xffff0001" | |
| 566 | sbc $t3,$acc0,$t1 | |
| 567 | adds $acc0,$acc1,$t0 // +=acc[0]<<96 and omit acc[0] | |
| 568 | adcs $acc1,$acc2,$t1 | |
| 569 | adcs $acc2,$acc3,$t2 // +=acc[0]*0xffff0001 | |
| 570 | adc $acc3,$t3,xzr // can't overflow | |
| 571 | ||
| 572 | adds $acc0,$acc0,$acc4 // accumulate upper half | |
| 573 | adcs $acc1,$acc1,$acc5 | |
| 574 | adcs $acc2,$acc2,$acc6 | |
| 575 | adcs $acc3,$acc3,$acc7 | |
| 576 | adc $acc4,xzr,xzr | |
| 577 | ||
| 578 | adds $t0,$acc0,#1 // subs $t0,$acc0,#-1 // tmp = ret-modulus | |
| 579 | sbcs $t1,$acc1,$poly1 | |
| 580 | sbcs $t2,$acc2,xzr | |
| 581 | sbcs $t3,$acc3,$poly3 | |
| 582 | sbcs xzr,$acc4,xzr // did it borrow? | |
| 583 | ||
| 584 | csel $acc0,$acc0,$t0,lo // ret = borrow ? ret : ret-modulus | |
| 585 | csel $acc1,$acc1,$t1,lo | |
| 586 | csel $acc2,$acc2,$t2,lo | |
| 587 | stp $acc0,$acc1,[$rp] | |
| 588 | csel $acc3,$acc3,$t3,lo | |
| 589 | stp $acc2,$acc3,[$rp,#16] | |
| 590 | ||
| 591 | ret | |
| 592 | .size __ecp_nistz256_sqr_mont,.-__ecp_nistz256_sqr_mont | |
| 593 | ||
| 594 | // Note that __ecp_nistz256_add expects both input vectors pre-loaded to | |
| 595 | // $a0-$a3 and $t0-$t3. This is done because it's used in multiple | |
| 596 | // contexts, e.g. in multiplication by 2 and 3... | |
| 597 | .type __ecp_nistz256_add,%function | |
| 598 | .align 4 | |
| 599 | __ecp_nistz256_add: | |
| 600 | adds $acc0,$acc0,$t0 // ret = a+b | |
| 601 | adcs $acc1,$acc1,$t1 | |
| 602 | adcs $acc2,$acc2,$t2 | |
| 603 | adcs $acc3,$acc3,$t3 | |
| 604 | adc $ap,xzr,xzr // zap $ap | |
| 605 | ||
| 606 | adds $t0,$acc0,#1 // subs $t0,$a0,#-1 // tmp = ret-modulus | |
| 607 | sbcs $t1,$acc1,$poly1 | |
| 608 | sbcs $t2,$acc2,xzr | |
| dfde4219 AP |
609 | sbcs $t3,$acc3,$poly3 |
| 610 | sbcs xzr,$ap,xzr // did subtraction borrow? | |
| e1613e7c | 611 | |
| dfde4219 AP |
612 | csel $acc0,$acc0,$t0,lo // ret = borrow ? ret : ret-modulus |
| 613 | csel $acc1,$acc1,$t1,lo | |
| 614 | csel $acc2,$acc2,$t2,lo | |
| e1613e7c | 615 | stp $acc0,$acc1,[$rp] |
| dfde4219 | 616 | csel $acc3,$acc3,$t3,lo |
| e1613e7c AP |
617 | stp $acc2,$acc3,[$rp,#16] |
| 618 | ||
| 619 | ret | |
| 620 | .size __ecp_nistz256_add,.-__ecp_nistz256_add | |
| 621 | ||
| 622 | .type __ecp_nistz256_sub_from,%function | |
| 623 | .align 4 | |
| 624 | __ecp_nistz256_sub_from: | |
| 625 | ldp $t0,$t1,[$bp] | |
| 626 | ldp $t2,$t3,[$bp,#16] | |
| 627 | subs $acc0,$acc0,$t0 // ret = a-b | |
| 628 | sbcs $acc1,$acc1,$t1 | |
| 629 | sbcs $acc2,$acc2,$t2 | |
| 630 | sbcs $acc3,$acc3,$t3 | |
| 631 | sbc $ap,xzr,xzr // zap $ap | |
| 632 | ||
| 633 | subs $t0,$acc0,#1 // adds $t0,$a0,#-1 // tmp = ret+modulus | |
| 634 | adcs $t1,$acc1,$poly1 | |
| 635 | adcs $t2,$acc2,xzr | |
| 636 | adc $t3,$acc3,$poly3 | |
| 637 | cmp $ap,xzr // did subtraction borrow? | |
| 638 | ||
| 639 | csel $acc0,$acc0,$t0,eq // ret = borrow ? ret+modulus : ret | |
| 640 | csel $acc1,$acc1,$t1,eq | |
| 641 | csel $acc2,$acc2,$t2,eq | |
| 642 | stp $acc0,$acc1,[$rp] | |
| 643 | csel $acc3,$acc3,$t3,eq | |
| 644 | stp $acc2,$acc3,[$rp,#16] | |
| 645 | ||
| 646 | ret | |
| 647 | .size __ecp_nistz256_sub_from,.-__ecp_nistz256_sub_from | |
| 648 | ||
| 649 | .type __ecp_nistz256_sub_morf,%function | |
| 650 | .align 4 | |
| 651 | __ecp_nistz256_sub_morf: | |
| 652 | ldp $t0,$t1,[$bp] | |
| 653 | ldp $t2,$t3,[$bp,#16] | |
| 654 | subs $acc0,$t0,$acc0 // ret = b-a | |
| 655 | sbcs $acc1,$t1,$acc1 | |
| 656 | sbcs $acc2,$t2,$acc2 | |
| 657 | sbcs $acc3,$t3,$acc3 | |
| 658 | sbc $ap,xzr,xzr // zap $ap | |
| 659 | ||
| 660 | subs $t0,$acc0,#1 // adds $t0,$a0,#-1 // tmp = ret+modulus | |
| 661 | adcs $t1,$acc1,$poly1 | |
| 662 | adcs $t2,$acc2,xzr | |
| 663 | adc $t3,$acc3,$poly3 | |
| 664 | cmp $ap,xzr // did subtraction borrow? | |
| 665 | ||
| 666 | csel $acc0,$acc0,$t0,eq // ret = borrow ? ret+modulus : ret | |
| 667 | csel $acc1,$acc1,$t1,eq | |
| 668 | csel $acc2,$acc2,$t2,eq | |
| 669 | stp $acc0,$acc1,[$rp] | |
| 670 | csel $acc3,$acc3,$t3,eq | |
| 671 | stp $acc2,$acc3,[$rp,#16] | |
| 672 | ||
| 673 | ret | |
| 674 | .size __ecp_nistz256_sub_morf,.-__ecp_nistz256_sub_morf | |
| 675 | ||
| 676 | .type __ecp_nistz256_div_by_2,%function | |
| 677 | .align 4 | |
| 678 | __ecp_nistz256_div_by_2: | |
| 679 | subs $t0,$acc0,#1 // adds $t0,$a0,#-1 // tmp = a+modulus | |
| 680 | adcs $t1,$acc1,$poly1 | |
| 681 | adcs $t2,$acc2,xzr | |
| 682 | adcs $t3,$acc3,$poly3 | |
| 683 | adc $ap,xzr,xzr // zap $ap | |
| 684 | tst $acc0,#1 // is a even? | |
| 685 | ||
| 609b0852 | 686 | csel $acc0,$acc0,$t0,eq // ret = even ? a : a+modulus |
| e1613e7c AP |
687 | csel $acc1,$acc1,$t1,eq |
| 688 | csel $acc2,$acc2,$t2,eq | |
| 689 | csel $acc3,$acc3,$t3,eq | |
| 690 | csel $ap,xzr,$ap,eq | |
| 691 | ||
| 692 | lsr $acc0,$acc0,#1 // ret >>= 1 | |
| 693 | orr $acc0,$acc0,$acc1,lsl#63 | |
| 694 | lsr $acc1,$acc1,#1 | |
| 695 | orr $acc1,$acc1,$acc2,lsl#63 | |
| 696 | lsr $acc2,$acc2,#1 | |
| 697 | orr $acc2,$acc2,$acc3,lsl#63 | |
| 698 | lsr $acc3,$acc3,#1 | |
| 699 | stp $acc0,$acc1,[$rp] | |
| 700 | orr $acc3,$acc3,$ap,lsl#63 | |
| 701 | stp $acc2,$acc3,[$rp,#16] | |
| 702 | ||
| 703 | ret | |
| 704 | .size __ecp_nistz256_div_by_2,.-__ecp_nistz256_div_by_2 | |
| 705 | ___ | |
| 706 | ######################################################################## | |
| 085b3860 | 707 | # following subroutines are "literal" implementation of those found in |
| e1613e7c AP |
708 | # ecp_nistz256.c |
| 709 | # | |
| 710 | ######################################################################## | |
| 711 | # void ecp_nistz256_point_double(P256_POINT *out,const P256_POINT *inp); | |
| 712 | # | |
| 713 | { | |
| 714 | my ($S,$M,$Zsqr,$tmp0)=map(32*$_,(0..3)); | |
| 715 | # above map() describes stack layout with 4 temporary | |
| 716 | # 256-bit vectors on top. | |
| 717 | my ($rp_real,$ap_real) = map("x$_",(21,22)); | |
| 718 | ||
| 719 | $code.=<<___; | |
| 720 | .globl ecp_nistz256_point_double | |
| 721 | .type ecp_nistz256_point_double,%function | |
| 722 | .align 5 | |
| 723 | ecp_nistz256_point_double: | |
| 9a18aae5 | 724 | .inst 0xd503233f // paciasp |
| 143ee099 | 725 | stp x29,x30,[sp,#-80]! |
| e1613e7c AP |
726 | add x29,sp,#0 |
| 727 | stp x19,x20,[sp,#16] | |
| 728 | stp x21,x22,[sp,#32] | |
| 729 | sub sp,sp,#32*4 | |
| 730 | ||
| 143ee099 | 731 | .Ldouble_shortcut: |
| e1613e7c AP |
732 | ldp $acc0,$acc1,[$ap,#32] |
| 733 | mov $rp_real,$rp | |
| 734 | ldp $acc2,$acc3,[$ap,#48] | |
| 735 | mov $ap_real,$ap | |
| 736 | ldr $poly1,.Lpoly+8 | |
| 737 | mov $t0,$acc0 | |
| 738 | ldr $poly3,.Lpoly+24 | |
| 739 | mov $t1,$acc1 | |
| 740 | ldp $a0,$a1,[$ap_real,#64] // forward load for p256_sqr_mont | |
| 741 | mov $t2,$acc2 | |
| 742 | mov $t3,$acc3 | |
| 743 | ldp $a2,$a3,[$ap_real,#64+16] | |
| 744 | add $rp,sp,#$S | |
| 745 | bl __ecp_nistz256_add // p256_mul_by_2(S, in_y); | |
| 746 | ||
| 747 | add $rp,sp,#$Zsqr | |
| 748 | bl __ecp_nistz256_sqr_mont // p256_sqr_mont(Zsqr, in_z); | |
| 749 | ||
| 750 | ldp $t0,$t1,[$ap_real] | |
| 751 | ldp $t2,$t3,[$ap_real,#16] | |
| 752 | mov $a0,$acc0 // put Zsqr aside for p256_sub | |
| 753 | mov $a1,$acc1 | |
| 754 | mov $a2,$acc2 | |
| 755 | mov $a3,$acc3 | |
| 756 | add $rp,sp,#$M | |
| 757 | bl __ecp_nistz256_add // p256_add(M, Zsqr, in_x); | |
| 758 | ||
| 759 | add $bp,$ap_real,#0 | |
| 760 | mov $acc0,$a0 // restore Zsqr | |
| 761 | mov $acc1,$a1 | |
| 762 | ldp $a0,$a1,[sp,#$S] // forward load for p256_sqr_mont | |
| 763 | mov $acc2,$a2 | |
| 764 | mov $acc3,$a3 | |
| 765 | ldp $a2,$a3,[sp,#$S+16] | |
| 766 | add $rp,sp,#$Zsqr | |
| 767 | bl __ecp_nistz256_sub_morf // p256_sub(Zsqr, in_x, Zsqr); | |
| 768 | ||
| 769 | add $rp,sp,#$S | |
| 770 | bl __ecp_nistz256_sqr_mont // p256_sqr_mont(S, S); | |
| 771 | ||
| 772 | ldr $bi,[$ap_real,#32] | |
| 773 | ldp $a0,$a1,[$ap_real,#64] | |
| 774 | ldp $a2,$a3,[$ap_real,#64+16] | |
| 775 | add $bp,$ap_real,#32 | |
| 776 | add $rp,sp,#$tmp0 | |
| 777 | bl __ecp_nistz256_mul_mont // p256_mul_mont(tmp0, in_z, in_y); | |
| 778 | ||
| 779 | mov $t0,$acc0 | |
| 780 | mov $t1,$acc1 | |
| 781 | ldp $a0,$a1,[sp,#$S] // forward load for p256_sqr_mont | |
| 782 | mov $t2,$acc2 | |
| 783 | mov $t3,$acc3 | |
| 784 | ldp $a2,$a3,[sp,#$S+16] | |
| 785 | add $rp,$rp_real,#64 | |
| 786 | bl __ecp_nistz256_add // p256_mul_by_2(res_z, tmp0); | |
| 787 | ||
| 788 | add $rp,sp,#$tmp0 | |
| 789 | bl __ecp_nistz256_sqr_mont // p256_sqr_mont(tmp0, S); | |
| 790 | ||
| 791 | ldr $bi,[sp,#$Zsqr] // forward load for p256_mul_mont | |
| 792 | ldp $a0,$a1,[sp,#$M] | |
| 793 | ldp $a2,$a3,[sp,#$M+16] | |
| 794 | add $rp,$rp_real,#32 | |
| 795 | bl __ecp_nistz256_div_by_2 // p256_div_by_2(res_y, tmp0); | |
| 796 | ||
| 797 | add $bp,sp,#$Zsqr | |
| 798 | add $rp,sp,#$M | |
| 799 | bl __ecp_nistz256_mul_mont // p256_mul_mont(M, M, Zsqr); | |
| 800 | ||
| 801 | mov $t0,$acc0 // duplicate M | |
| 802 | mov $t1,$acc1 | |
| 803 | mov $t2,$acc2 | |
| 804 | mov $t3,$acc3 | |
| 805 | mov $a0,$acc0 // put M aside | |
| 806 | mov $a1,$acc1 | |
| 807 | mov $a2,$acc2 | |
| 808 | mov $a3,$acc3 | |
| 809 | add $rp,sp,#$M | |
| 810 | bl __ecp_nistz256_add | |
| 811 | mov $t0,$a0 // restore M | |
| 812 | mov $t1,$a1 | |
| 813 | ldr $bi,[$ap_real] // forward load for p256_mul_mont | |
| 814 | mov $t2,$a2 | |
| 815 | ldp $a0,$a1,[sp,#$S] | |
| 816 | mov $t3,$a3 | |
| 817 | ldp $a2,$a3,[sp,#$S+16] | |
| 818 | bl __ecp_nistz256_add // p256_mul_by_3(M, M); | |
| 819 | ||
| 820 | add $bp,$ap_real,#0 | |
| 821 | add $rp,sp,#$S | |
| 822 | bl __ecp_nistz256_mul_mont // p256_mul_mont(S, S, in_x); | |
| 823 | ||
| 824 | mov $t0,$acc0 | |
| 825 | mov $t1,$acc1 | |
| 826 | ldp $a0,$a1,[sp,#$M] // forward load for p256_sqr_mont | |
| 827 | mov $t2,$acc2 | |
| 828 | mov $t3,$acc3 | |
| 829 | ldp $a2,$a3,[sp,#$M+16] | |
| 830 | add $rp,sp,#$tmp0 | |
| 831 | bl __ecp_nistz256_add // p256_mul_by_2(tmp0, S); | |
| 832 | ||
| 833 | add $rp,$rp_real,#0 | |
| 834 | bl __ecp_nistz256_sqr_mont // p256_sqr_mont(res_x, M); | |
| 835 | ||
| 836 | add $bp,sp,#$tmp0 | |
| 837 | bl __ecp_nistz256_sub_from // p256_sub(res_x, res_x, tmp0); | |
| 838 | ||
| 839 | add $bp,sp,#$S | |
| 840 | add $rp,sp,#$S | |
| 841 | bl __ecp_nistz256_sub_morf // p256_sub(S, S, res_x); | |
| 842 | ||
| 843 | ldr $bi,[sp,#$M] | |
| 844 | mov $a0,$acc0 // copy S | |
| 845 | mov $a1,$acc1 | |
| 846 | mov $a2,$acc2 | |
| 847 | mov $a3,$acc3 | |
| 848 | add $bp,sp,#$M | |
| 849 | bl __ecp_nistz256_mul_mont // p256_mul_mont(S, S, M); | |
| 850 | ||
| 851 | add $bp,$rp_real,#32 | |
| 852 | add $rp,$rp_real,#32 | |
| 853 | bl __ecp_nistz256_sub_from // p256_sub(res_y, S, res_y); | |
| 854 | ||
| 855 | add sp,x29,#0 // destroy frame | |
| 856 | ldp x19,x20,[x29,#16] | |
| 857 | ldp x21,x22,[x29,#32] | |
| 143ee099 | 858 | ldp x29,x30,[sp],#80 |
| 9a18aae5 | 859 | .inst 0xd50323bf // autiasp |
| e1613e7c AP |
860 | ret |
| 861 | .size ecp_nistz256_point_double,.-ecp_nistz256_point_double | |
| 862 | ___ | |
| 863 | } | |
| 864 | ||
| 865 | ######################################################################## | |
| 866 | # void ecp_nistz256_point_add(P256_POINT *out,const P256_POINT *in1, | |
| 867 | # const P256_POINT *in2); | |
| 868 | { | |
| 869 | my ($res_x,$res_y,$res_z, | |
| 870 | $H,$Hsqr,$R,$Rsqr,$Hcub, | |
| 871 | $U1,$U2,$S1,$S2)=map(32*$_,(0..11)); | |
| 872 | my ($Z1sqr, $Z2sqr) = ($Hsqr, $Rsqr); | |
| 873 | # above map() describes stack layout with 12 temporary | |
| 874 | # 256-bit vectors on top. | |
| 875 | my ($rp_real,$ap_real,$bp_real,$in1infty,$in2infty,$temp)=map("x$_",(21..26)); | |
| 876 | ||
| 877 | $code.=<<___; | |
| 878 | .globl ecp_nistz256_point_add | |
| 879 | .type ecp_nistz256_point_add,%function | |
| 880 | .align 5 | |
| 881 | ecp_nistz256_point_add: | |
| 9a18aae5 | 882 | .inst 0xd503233f // paciasp |
| e1613e7c AP |
883 | stp x29,x30,[sp,#-80]! |
| 884 | add x29,sp,#0 | |
| 885 | stp x19,x20,[sp,#16] | |
| 886 | stp x21,x22,[sp,#32] | |
| 887 | stp x23,x24,[sp,#48] | |
| 888 | stp x25,x26,[sp,#64] | |
| 889 | sub sp,sp,#32*12 | |
| 890 | ||
| c74aea8d AP |
891 | ldp $a0,$a1,[$bp,#64] // in2_z |
| 892 | ldp $a2,$a3,[$bp,#64+16] | |
| e1613e7c AP |
893 | mov $rp_real,$rp |
| 894 | mov $ap_real,$ap | |
| 895 | mov $bp_real,$bp | |
| e1613e7c AP |
896 | ldr $poly1,.Lpoly+8 |
| 897 | ldr $poly3,.Lpoly+24 | |
| c74aea8d AP |
898 | orr $t0,$a0,$a1 |
| 899 | orr $t2,$a2,$a3 | |
| 900 | orr $in2infty,$t0,$t2 | |
| 901 | cmp $in2infty,#0 | |
| 902 | csetm $in2infty,ne // !in2infty | |
| e1613e7c AP |
903 | add $rp,sp,#$Z2sqr |
| 904 | bl __ecp_nistz256_sqr_mont // p256_sqr_mont(Z2sqr, in2_z); | |
| 905 | ||
| c74aea8d | 906 | ldp $a0,$a1,[$ap_real,#64] // in1_z |
| e1613e7c | 907 | ldp $a2,$a3,[$ap_real,#64+16] |
| c74aea8d AP |
908 | orr $t0,$a0,$a1 |
| 909 | orr $t2,$a2,$a3 | |
| 910 | orr $in1infty,$t0,$t2 | |
| 911 | cmp $in1infty,#0 | |
| 912 | csetm $in1infty,ne // !in1infty | |
| e1613e7c AP |
913 | add $rp,sp,#$Z1sqr |
| 914 | bl __ecp_nistz256_sqr_mont // p256_sqr_mont(Z1sqr, in1_z); | |
| 915 | ||
| 916 | ldr $bi,[$bp_real,#64] | |
| 917 | ldp $a0,$a1,[sp,#$Z2sqr] | |
| 918 | ldp $a2,$a3,[sp,#$Z2sqr+16] | |
| 919 | add $bp,$bp_real,#64 | |
| 920 | add $rp,sp,#$S1 | |
| 921 | bl __ecp_nistz256_mul_mont // p256_mul_mont(S1, Z2sqr, in2_z); | |
| 922 | ||
| 923 | ldr $bi,[$ap_real,#64] | |
| 924 | ldp $a0,$a1,[sp,#$Z1sqr] | |
| 925 | ldp $a2,$a3,[sp,#$Z1sqr+16] | |
| 926 | add $bp,$ap_real,#64 | |
| 927 | add $rp,sp,#$S2 | |
| 928 | bl __ecp_nistz256_mul_mont // p256_mul_mont(S2, Z1sqr, in1_z); | |
| 929 | ||
| 930 | ldr $bi,[$ap_real,#32] | |
| 931 | ldp $a0,$a1,[sp,#$S1] | |
| 932 | ldp $a2,$a3,[sp,#$S1+16] | |
| 933 | add $bp,$ap_real,#32 | |
| 934 | add $rp,sp,#$S1 | |
| 935 | bl __ecp_nistz256_mul_mont // p256_mul_mont(S1, S1, in1_y); | |
| 936 | ||
| 937 | ldr $bi,[$bp_real,#32] | |
| 938 | ldp $a0,$a1,[sp,#$S2] | |
| 939 | ldp $a2,$a3,[sp,#$S2+16] | |
| 940 | add $bp,$bp_real,#32 | |
| 941 | add $rp,sp,#$S2 | |
| 942 | bl __ecp_nistz256_mul_mont // p256_mul_mont(S2, S2, in2_y); | |
| 943 | ||
| 944 | add $bp,sp,#$S1 | |
| 945 | ldr $bi,[sp,#$Z2sqr] // forward load for p256_mul_mont | |
| 946 | ldp $a0,$a1,[$ap_real] | |
| 947 | ldp $a2,$a3,[$ap_real,#16] | |
| 948 | add $rp,sp,#$R | |
| 949 | bl __ecp_nistz256_sub_from // p256_sub(R, S2, S1); | |
| 950 | ||
| 951 | orr $acc0,$acc0,$acc1 // see if result is zero | |
| 952 | orr $acc2,$acc2,$acc3 | |
| 953 | orr $temp,$acc0,$acc2 | |
| 954 | ||
| 955 | add $bp,sp,#$Z2sqr | |
| 956 | add $rp,sp,#$U1 | |
| 957 | bl __ecp_nistz256_mul_mont // p256_mul_mont(U1, in1_x, Z2sqr); | |
| 958 | ||
| 959 | ldr $bi,[sp,#$Z1sqr] | |
| 960 | ldp $a0,$a1,[$bp_real] | |
| 961 | ldp $a2,$a3,[$bp_real,#16] | |
| 962 | add $bp,sp,#$Z1sqr | |
| 963 | add $rp,sp,#$U2 | |
| 964 | bl __ecp_nistz256_mul_mont // p256_mul_mont(U2, in2_x, Z1sqr); | |
| 965 | ||
| 966 | add $bp,sp,#$U1 | |
| 967 | ldp $a0,$a1,[sp,#$R] // forward load for p256_sqr_mont | |
| 968 | ldp $a2,$a3,[sp,#$R+16] | |
| 969 | add $rp,sp,#$H | |
| 970 | bl __ecp_nistz256_sub_from // p256_sub(H, U2, U1); | |
| 971 | ||
| 972 | orr $acc0,$acc0,$acc1 // see if result is zero | |
| 973 | orr $acc2,$acc2,$acc3 | |
| 974 | orr $acc0,$acc0,$acc2 | |
| 975 | tst $acc0,$acc0 | |
| 976 | b.ne .Ladd_proceed // is_equal(U1,U2)? | |
| 977 | ||
| 978 | tst $in1infty,$in2infty | |
| 979 | b.eq .Ladd_proceed // (in1infty || in2infty)? | |
| 980 | ||
| 981 | tst $temp,$temp | |
| 143ee099 | 982 | b.eq .Ladd_double // is_equal(S1,S2)? |
| e1613e7c AP |
983 | |
| 984 | eor $a0,$a0,$a0 | |
| 985 | eor $a1,$a1,$a1 | |
| 986 | stp $a0,$a1,[$rp_real] | |
| 987 | stp $a0,$a1,[$rp_real,#16] | |
| 988 | stp $a0,$a1,[$rp_real,#32] | |
| 989 | stp $a0,$a1,[$rp_real,#48] | |
| 990 | stp $a0,$a1,[$rp_real,#64] | |
| 991 | stp $a0,$a1,[$rp_real,#80] | |
| 992 | b .Ladd_done | |
| 993 | ||
| 143ee099 AP |
994 | .align 4 |
| 995 | .Ladd_double: | |
| 996 | mov $ap,$ap_real | |
| 997 | mov $rp,$rp_real | |
| 998 | ldp x23,x24,[x29,#48] | |
| 999 | ldp x25,x26,[x29,#64] | |
| 1000 | add sp,sp,#32*(12-4) // difference in stack frames | |
| 1001 | b .Ldouble_shortcut | |
| 1002 | ||
| e1613e7c AP |
1003 | .align 4 |
| 1004 | .Ladd_proceed: | |
| 1005 | add $rp,sp,#$Rsqr | |
| 1006 | bl __ecp_nistz256_sqr_mont // p256_sqr_mont(Rsqr, R); | |
| 1007 | ||
| 1008 | ldr $bi,[$ap_real,#64] | |
| 1009 | ldp $a0,$a1,[sp,#$H] | |
| 1010 | ldp $a2,$a3,[sp,#$H+16] | |
| 1011 | add $bp,$ap_real,#64 | |
| 1012 | add $rp,sp,#$res_z | |
| 1013 | bl __ecp_nistz256_mul_mont // p256_mul_mont(res_z, H, in1_z); | |
| 1014 | ||
| 1015 | ldp $a0,$a1,[sp,#$H] | |
| 1016 | ldp $a2,$a3,[sp,#$H+16] | |
| 1017 | add $rp,sp,#$Hsqr | |
| 1018 | bl __ecp_nistz256_sqr_mont // p256_sqr_mont(Hsqr, H); | |
| 1019 | ||
| 1020 | ldr $bi,[$bp_real,#64] | |
| 1021 | ldp $a0,$a1,[sp,#$res_z] | |
| 1022 | ldp $a2,$a3,[sp,#$res_z+16] | |
| 1023 | add $bp,$bp_real,#64 | |
| 1024 | add $rp,sp,#$res_z | |
| 1025 | bl __ecp_nistz256_mul_mont // p256_mul_mont(res_z, res_z, in2_z); | |
| 1026 | ||
| 1027 | ldr $bi,[sp,#$H] | |
| 1028 | ldp $a0,$a1,[sp,#$Hsqr] | |
| 1029 | ldp $a2,$a3,[sp,#$Hsqr+16] | |
| 1030 | add $bp,sp,#$H | |
| 1031 | add $rp,sp,#$Hcub | |
| 1032 | bl __ecp_nistz256_mul_mont // p256_mul_mont(Hcub, Hsqr, H); | |
| 1033 | ||
| 1034 | ldr $bi,[sp,#$Hsqr] | |
| 1035 | ldp $a0,$a1,[sp,#$U1] | |
| 1036 | ldp $a2,$a3,[sp,#$U1+16] | |
| 1037 | add $bp,sp,#$Hsqr | |
| 1038 | add $rp,sp,#$U2 | |
| 1039 | bl __ecp_nistz256_mul_mont // p256_mul_mont(U2, U1, Hsqr); | |
| 1040 | ||
| 1041 | mov $t0,$acc0 | |
| 1042 | mov $t1,$acc1 | |
| 1043 | mov $t2,$acc2 | |
| 1044 | mov $t3,$acc3 | |
| 1045 | add $rp,sp,#$Hsqr | |
| 1046 | bl __ecp_nistz256_add // p256_mul_by_2(Hsqr, U2); | |
| 1047 | ||
| 1048 | add $bp,sp,#$Rsqr | |
| 1049 | add $rp,sp,#$res_x | |
| 1050 | bl __ecp_nistz256_sub_morf // p256_sub(res_x, Rsqr, Hsqr); | |
| 1051 | ||
| 1052 | add $bp,sp,#$Hcub | |
| 1053 | bl __ecp_nistz256_sub_from // p256_sub(res_x, res_x, Hcub); | |
| 1054 | ||
| 1055 | add $bp,sp,#$U2 | |
| 1056 | ldr $bi,[sp,#$Hcub] // forward load for p256_mul_mont | |
| 1057 | ldp $a0,$a1,[sp,#$S1] | |
| 1058 | ldp $a2,$a3,[sp,#$S1+16] | |
| 1059 | add $rp,sp,#$res_y | |
| 1060 | bl __ecp_nistz256_sub_morf // p256_sub(res_y, U2, res_x); | |
| 1061 | ||
| 1062 | add $bp,sp,#$Hcub | |
| 1063 | add $rp,sp,#$S2 | |
| 1064 | bl __ecp_nistz256_mul_mont // p256_mul_mont(S2, S1, Hcub); | |
| 1065 | ||
| 1066 | ldr $bi,[sp,#$R] | |
| 1067 | ldp $a0,$a1,[sp,#$res_y] | |
| 1068 | ldp $a2,$a3,[sp,#$res_y+16] | |
| 1069 | add $bp,sp,#$R | |
| 1070 | add $rp,sp,#$res_y | |
| 1071 | bl __ecp_nistz256_mul_mont // p256_mul_mont(res_y, res_y, R); | |
| 1072 | ||
| 1073 | add $bp,sp,#$S2 | |
| 1074 | bl __ecp_nistz256_sub_from // p256_sub(res_y, res_y, S2); | |
| 1075 | ||
| 1076 | ldp $a0,$a1,[sp,#$res_x] // res | |
| 1077 | ldp $a2,$a3,[sp,#$res_x+16] | |
| 1078 | ldp $t0,$t1,[$bp_real] // in2 | |
| 1079 | ldp $t2,$t3,[$bp_real,#16] | |
| 1080 | ___ | |
| 1081 | for($i=0;$i<64;$i+=32) { # conditional moves | |
| 1082 | $code.=<<___; | |
| 1083 | ldp $acc0,$acc1,[$ap_real,#$i] // in1 | |
| 1084 | cmp $in1infty,#0 // !$in1intfy, remember? | |
| 1085 | ldp $acc2,$acc3,[$ap_real,#$i+16] | |
| 1086 | csel $t0,$a0,$t0,ne | |
| 1087 | csel $t1,$a1,$t1,ne | |
| 1088 | ldp $a0,$a1,[sp,#$res_x+$i+32] // res | |
| 1089 | csel $t2,$a2,$t2,ne | |
| 1090 | csel $t3,$a3,$t3,ne | |
| 1091 | cmp $in2infty,#0 // !$in2intfy, remember? | |
| 1092 | ldp $a2,$a3,[sp,#$res_x+$i+48] | |
| 1093 | csel $acc0,$t0,$acc0,ne | |
| 1094 | csel $acc1,$t1,$acc1,ne | |
| 1095 | ldp $t0,$t1,[$bp_real,#$i+32] // in2 | |
| 1096 | csel $acc2,$t2,$acc2,ne | |
| 1097 | csel $acc3,$t3,$acc3,ne | |
| 1098 | ldp $t2,$t3,[$bp_real,#$i+48] | |
| 1099 | stp $acc0,$acc1,[$rp_real,#$i] | |
| 1100 | stp $acc2,$acc3,[$rp_real,#$i+16] | |
| 1101 | ___ | |
| 1102 | } | |
| 1103 | $code.=<<___; | |
| 1104 | ldp $acc0,$acc1,[$ap_real,#$i] // in1 | |
| 1105 | cmp $in1infty,#0 // !$in1intfy, remember? | |
| 1106 | ldp $acc2,$acc3,[$ap_real,#$i+16] | |
| 1107 | csel $t0,$a0,$t0,ne | |
| 1108 | csel $t1,$a1,$t1,ne | |
| 1109 | csel $t2,$a2,$t2,ne | |
| 1110 | csel $t3,$a3,$t3,ne | |
| 1111 | cmp $in2infty,#0 // !$in2intfy, remember? | |
| 1112 | csel $acc0,$t0,$acc0,ne | |
| 1113 | csel $acc1,$t1,$acc1,ne | |
| 1114 | csel $acc2,$t2,$acc2,ne | |
| 1115 | csel $acc3,$t3,$acc3,ne | |
| 1116 | stp $acc0,$acc1,[$rp_real,#$i] | |
| 1117 | stp $acc2,$acc3,[$rp_real,#$i+16] | |
| 1118 | ||
| 1119 | .Ladd_done: | |
| 9a18aae5 | 1120 | add sp,x29,#0 // destroy frame |
| e1613e7c AP |
1121 | ldp x19,x20,[x29,#16] |
| 1122 | ldp x21,x22,[x29,#32] | |
| 1123 | ldp x23,x24,[x29,#48] | |
| 1124 | ldp x25,x26,[x29,#64] | |
| 1125 | ldp x29,x30,[sp],#80 | |
| 9a18aae5 | 1126 | .inst 0xd50323bf // autiasp |
| e1613e7c AP |
1127 | ret |
| 1128 | .size ecp_nistz256_point_add,.-ecp_nistz256_point_add | |
| 1129 | ___ | |
| 1130 | } | |
| 1131 | ||
| 1132 | ######################################################################## | |
| 1133 | # void ecp_nistz256_point_add_affine(P256_POINT *out,const P256_POINT *in1, | |
| 1134 | # const P256_POINT_AFFINE *in2); | |
| 1135 | { | |
| 1136 | my ($res_x,$res_y,$res_z, | |
| 1137 | $U2,$S2,$H,$R,$Hsqr,$Hcub,$Rsqr)=map(32*$_,(0..9)); | |
| 1138 | my $Z1sqr = $S2; | |
| 1139 | # above map() describes stack layout with 10 temporary | |
| 1140 | # 256-bit vectors on top. | |
| 1141 | my ($rp_real,$ap_real,$bp_real,$in1infty,$in2infty,$temp)=map("x$_",(21..26)); | |
| 1142 | ||
| 1143 | $code.=<<___; | |
| 1144 | .globl ecp_nistz256_point_add_affine | |
| 1145 | .type ecp_nistz256_point_add_affine,%function | |
| 1146 | .align 5 | |
| 1147 | ecp_nistz256_point_add_affine: | |
| 9a18aae5 | 1148 | .inst 0xd503233f // paciasp |
| e1613e7c AP |
1149 | stp x29,x30,[sp,#-80]! |
| 1150 | add x29,sp,#0 | |
| 1151 | stp x19,x20,[sp,#16] | |
| 1152 | stp x21,x22,[sp,#32] | |
| 1153 | stp x23,x24,[sp,#48] | |
| 1154 | stp x25,x26,[sp,#64] | |
| 1155 | sub sp,sp,#32*10 | |
| 1156 | ||
| 1157 | mov $rp_real,$rp | |
| 1158 | mov $ap_real,$ap | |
| 1159 | mov $bp_real,$bp | |
| 1160 | ldr $poly1,.Lpoly+8 | |
| 1161 | ldr $poly3,.Lpoly+24 | |
| 1162 | ||
| c74aea8d AP |
1163 | ldp $a0,$a1,[$ap,#64] // in1_z |
| 1164 | ldp $a2,$a3,[$ap,#64+16] | |
| 1165 | orr $t0,$a0,$a1 | |
| 1166 | orr $t2,$a2,$a3 | |
| 1167 | orr $in1infty,$t0,$t2 | |
| e1613e7c AP |
1168 | cmp $in1infty,#0 |
| 1169 | csetm $in1infty,ne // !in1infty | |
| 1170 | ||
| c74aea8d AP |
1171 | ldp $acc0,$acc1,[$bp] // in2_x |
| 1172 | ldp $acc2,$acc3,[$bp,#16] | |
| 1173 | ldp $t0,$t1,[$bp,#32] // in2_y | |
| e1613e7c | 1174 | ldp $t2,$t3,[$bp,#48] |
| c74aea8d AP |
1175 | orr $acc0,$acc0,$acc1 |
| 1176 | orr $acc2,$acc2,$acc3 | |
| e1613e7c AP |
1177 | orr $t0,$t0,$t1 |
| 1178 | orr $t2,$t2,$t3 | |
| c74aea8d | 1179 | orr $acc0,$acc0,$acc2 |
| e1613e7c | 1180 | orr $t0,$t0,$t2 |
| c74aea8d | 1181 | orr $in2infty,$acc0,$t0 |
| e1613e7c AP |
1182 | cmp $in2infty,#0 |
| 1183 | csetm $in2infty,ne // !in2infty | |
| 1184 | ||
| e1613e7c AP |
1185 | add $rp,sp,#$Z1sqr |
| 1186 | bl __ecp_nistz256_sqr_mont // p256_sqr_mont(Z1sqr, in1_z); | |
| 1187 | ||
| 1188 | mov $a0,$acc0 | |
| 1189 | mov $a1,$acc1 | |
| 1190 | mov $a2,$acc2 | |
| 1191 | mov $a3,$acc3 | |
| 1192 | ldr $bi,[$bp_real] | |
| 1193 | add $bp,$bp_real,#0 | |
| 1194 | add $rp,sp,#$U2 | |
| 1195 | bl __ecp_nistz256_mul_mont // p256_mul_mont(U2, Z1sqr, in2_x); | |
| 1196 | ||
| 1197 | add $bp,$ap_real,#0 | |
| 1198 | ldr $bi,[$ap_real,#64] // forward load for p256_mul_mont | |
| 1199 | ldp $a0,$a1,[sp,#$Z1sqr] | |
| 1200 | ldp $a2,$a3,[sp,#$Z1sqr+16] | |
| 1201 | add $rp,sp,#$H | |
| 1202 | bl __ecp_nistz256_sub_from // p256_sub(H, U2, in1_x); | |
| 1203 | ||
| 1204 | add $bp,$ap_real,#64 | |
| 1205 | add $rp,sp,#$S2 | |
| 1206 | bl __ecp_nistz256_mul_mont // p256_mul_mont(S2, Z1sqr, in1_z); | |
| 1207 | ||
| 1208 | ldr $bi,[$ap_real,#64] | |
| 1209 | ldp $a0,$a1,[sp,#$H] | |
| 1210 | ldp $a2,$a3,[sp,#$H+16] | |
| 1211 | add $bp,$ap_real,#64 | |
| 1212 | add $rp,sp,#$res_z | |
| 1213 | bl __ecp_nistz256_mul_mont // p256_mul_mont(res_z, H, in1_z); | |
| 1214 | ||
| 1215 | ldr $bi,[$bp_real,#32] | |
| 1216 | ldp $a0,$a1,[sp,#$S2] | |
| 1217 | ldp $a2,$a3,[sp,#$S2+16] | |
| 1218 | add $bp,$bp_real,#32 | |
| 1219 | add $rp,sp,#$S2 | |
| 1220 | bl __ecp_nistz256_mul_mont // p256_mul_mont(S2, S2, in2_y); | |
| 1221 | ||
| 1222 | add $bp,$ap_real,#32 | |
| 1223 | ldp $a0,$a1,[sp,#$H] // forward load for p256_sqr_mont | |
| 1224 | ldp $a2,$a3,[sp,#$H+16] | |
| 1225 | add $rp,sp,#$R | |
| 1226 | bl __ecp_nistz256_sub_from // p256_sub(R, S2, in1_y); | |
| 1227 | ||
| 1228 | add $rp,sp,#$Hsqr | |
| 1229 | bl __ecp_nistz256_sqr_mont // p256_sqr_mont(Hsqr, H); | |
| 1230 | ||
| 1231 | ldp $a0,$a1,[sp,#$R] | |
| 1232 | ldp $a2,$a3,[sp,#$R+16] | |
| 1233 | add $rp,sp,#$Rsqr | |
| 1234 | bl __ecp_nistz256_sqr_mont // p256_sqr_mont(Rsqr, R); | |
| 1235 | ||
| 1236 | ldr $bi,[sp,#$H] | |
| 1237 | ldp $a0,$a1,[sp,#$Hsqr] | |
| 1238 | ldp $a2,$a3,[sp,#$Hsqr+16] | |
| 1239 | add $bp,sp,#$H | |
| 1240 | add $rp,sp,#$Hcub | |
| 1241 | bl __ecp_nistz256_mul_mont // p256_mul_mont(Hcub, Hsqr, H); | |
| 1242 | ||
| 1243 | ldr $bi,[$ap_real] | |
| 1244 | ldp $a0,$a1,[sp,#$Hsqr] | |
| 1245 | ldp $a2,$a3,[sp,#$Hsqr+16] | |
| 1246 | add $bp,$ap_real,#0 | |
| 1247 | add $rp,sp,#$U2 | |
| 1248 | bl __ecp_nistz256_mul_mont // p256_mul_mont(U2, in1_x, Hsqr); | |
| 1249 | ||
| 1250 | mov $t0,$acc0 | |
| 1251 | mov $t1,$acc1 | |
| 1252 | mov $t2,$acc2 | |
| 1253 | mov $t3,$acc3 | |
| 1254 | add $rp,sp,#$Hsqr | |
| 1255 | bl __ecp_nistz256_add // p256_mul_by_2(Hsqr, U2); | |
| 1256 | ||
| 1257 | add $bp,sp,#$Rsqr | |
| 1258 | add $rp,sp,#$res_x | |
| 1259 | bl __ecp_nistz256_sub_morf // p256_sub(res_x, Rsqr, Hsqr); | |
| 1260 | ||
| 1261 | add $bp,sp,#$Hcub | |
| 1262 | bl __ecp_nistz256_sub_from // p256_sub(res_x, res_x, Hcub); | |
| 1263 | ||
| 1264 | add $bp,sp,#$U2 | |
| 1265 | ldr $bi,[$ap_real,#32] // forward load for p256_mul_mont | |
| 1266 | ldp $a0,$a1,[sp,#$Hcub] | |
| 1267 | ldp $a2,$a3,[sp,#$Hcub+16] | |
| 1268 | add $rp,sp,#$res_y | |
| 1269 | bl __ecp_nistz256_sub_morf // p256_sub(res_y, U2, res_x); | |
| 1270 | ||
| 1271 | add $bp,$ap_real,#32 | |
| 1272 | add $rp,sp,#$S2 | |
| 1273 | bl __ecp_nistz256_mul_mont // p256_mul_mont(S2, in1_y, Hcub); | |
| 1274 | ||
| 1275 | ldr $bi,[sp,#$R] | |
| 1276 | ldp $a0,$a1,[sp,#$res_y] | |
| 1277 | ldp $a2,$a3,[sp,#$res_y+16] | |
| 1278 | add $bp,sp,#$R | |
| 1279 | add $rp,sp,#$res_y | |
| 1280 | bl __ecp_nistz256_mul_mont // p256_mul_mont(res_y, res_y, R); | |
| 1281 | ||
| 1282 | add $bp,sp,#$S2 | |
| 1283 | bl __ecp_nistz256_sub_from // p256_sub(res_y, res_y, S2); | |
| 1284 | ||
| 1285 | ldp $a0,$a1,[sp,#$res_x] // res | |
| 1286 | ldp $a2,$a3,[sp,#$res_x+16] | |
| 1287 | ldp $t0,$t1,[$bp_real] // in2 | |
| 1288 | ldp $t2,$t3,[$bp_real,#16] | |
| 1289 | ___ | |
| 1290 | for($i=0;$i<64;$i+=32) { # conditional moves | |
| 1291 | $code.=<<___; | |
| 1292 | ldp $acc0,$acc1,[$ap_real,#$i] // in1 | |
| 1293 | cmp $in1infty,#0 // !$in1intfy, remember? | |
| 1294 | ldp $acc2,$acc3,[$ap_real,#$i+16] | |
| 1295 | csel $t0,$a0,$t0,ne | |
| 1296 | csel $t1,$a1,$t1,ne | |
| 1297 | ldp $a0,$a1,[sp,#$res_x+$i+32] // res | |
| 1298 | csel $t2,$a2,$t2,ne | |
| 1299 | csel $t3,$a3,$t3,ne | |
| 1300 | cmp $in2infty,#0 // !$in2intfy, remember? | |
| 1301 | ldp $a2,$a3,[sp,#$res_x+$i+48] | |
| 1302 | csel $acc0,$t0,$acc0,ne | |
| 1303 | csel $acc1,$t1,$acc1,ne | |
| 1304 | ldp $t0,$t1,[$bp_real,#$i+32] // in2 | |
| 1305 | csel $acc2,$t2,$acc2,ne | |
| 1306 | csel $acc3,$t3,$acc3,ne | |
| 1307 | ldp $t2,$t3,[$bp_real,#$i+48] | |
| 1308 | stp $acc0,$acc1,[$rp_real,#$i] | |
| 1309 | stp $acc2,$acc3,[$rp_real,#$i+16] | |
| 1310 | ___ | |
| 57758351 AP |
1311 | $code.=<<___ if ($i == 0); |
| 1312 | adr $bp_real,.Lone_mont-64 | |
| 1313 | ___ | |
| e1613e7c AP |
1314 | } |
| 1315 | $code.=<<___; | |
| 1316 | ldp $acc0,$acc1,[$ap_real,#$i] // in1 | |
| 1317 | cmp $in1infty,#0 // !$in1intfy, remember? | |
| 1318 | ldp $acc2,$acc3,[$ap_real,#$i+16] | |
| 1319 | csel $t0,$a0,$t0,ne | |
| 1320 | csel $t1,$a1,$t1,ne | |
| 1321 | csel $t2,$a2,$t2,ne | |
| 1322 | csel $t3,$a3,$t3,ne | |
| 1323 | cmp $in2infty,#0 // !$in2intfy, remember? | |
| 1324 | csel $acc0,$t0,$acc0,ne | |
| 1325 | csel $acc1,$t1,$acc1,ne | |
| 1326 | csel $acc2,$t2,$acc2,ne | |
| 1327 | csel $acc3,$t3,$acc3,ne | |
| 1328 | stp $acc0,$acc1,[$rp_real,#$i] | |
| 1329 | stp $acc2,$acc3,[$rp_real,#$i+16] | |
| 1330 | ||
| 1331 | add sp,x29,#0 // destroy frame | |
| 1332 | ldp x19,x20,[x29,#16] | |
| 1333 | ldp x21,x22,[x29,#32] | |
| 1334 | ldp x23,x24,[x29,#48] | |
| 1335 | ldp x25,x26,[x29,#64] | |
| 1336 | ldp x29,x30,[sp],#80 | |
| 9a18aae5 | 1337 | .inst 0xd50323bf // autiasp |
| e1613e7c AP |
1338 | ret |
| 1339 | .size ecp_nistz256_point_add_affine,.-ecp_nistz256_point_add_affine | |
| 1340 | ___ | |
| ab4f2026 AP |
1341 | } |
| 1342 | if (1) { | |
| 1343 | my ($ord0,$ord1) = ($poly1,$poly3); | |
| 1344 | my ($ord2,$ord3,$ordk,$t4) = map("x$_",(21..24)); | |
| 1345 | my $acc7 = $bi; | |
| 1346 | ||
| 1347 | $code.=<<___; | |
| 1348 | //////////////////////////////////////////////////////////////////////// | |
| 1349 | // void ecp_nistz256_ord_mul_mont(uint64_t res[4], uint64_t a[4], | |
| 1350 | // uint64_t b[4]); | |
| 1351 | .globl ecp_nistz256_ord_mul_mont | |
| 1352 | .type ecp_nistz256_ord_mul_mont,%function | |
| 1353 | .align 4 | |
| 1354 | ecp_nistz256_ord_mul_mont: | |
| 1355 | stp x29,x30,[sp,#-64]! | |
| 1356 | add x29,sp,#0 | |
| 1357 | stp x19,x20,[sp,#16] | |
| 1358 | stp x21,x22,[sp,#32] | |
| 1359 | stp x23,x24,[sp,#48] | |
| 1360 | ||
| 1361 | adr $ordk,.Lord | |
| 1362 | ldr $bi,[$bp] // bp[0] | |
| 1363 | ldp $a0,$a1,[$ap] | |
| 1364 | ldp $a2,$a3,[$ap,#16] | |
| 1365 | ||
| 1366 | ldp $ord0,$ord1,[$ordk,#0] | |
| 1367 | ldp $ord2,$ord3,[$ordk,#16] | |
| 1368 | ldr $ordk,[$ordk,#32] | |
| 1369 | ||
| 1370 | mul $acc0,$a0,$bi // a[0]*b[0] | |
| 1371 | umulh $t0,$a0,$bi | |
| 1372 | ||
| 1373 | mul $acc1,$a1,$bi // a[1]*b[0] | |
| 1374 | umulh $t1,$a1,$bi | |
| 1375 | ||
| 1376 | mul $acc2,$a2,$bi // a[2]*b[0] | |
| 1377 | umulh $t2,$a2,$bi | |
| 1378 | ||
| 1379 | mul $acc3,$a3,$bi // a[3]*b[0] | |
| 1380 | umulh $acc4,$a3,$bi | |
| 1381 | ||
| 1382 | mul $t4,$acc0,$ordk | |
| 1383 | ||
| 1384 | adds $acc1,$acc1,$t0 // accumulate high parts of multiplication | |
| 1385 | adcs $acc2,$acc2,$t1 | |
| 1386 | adcs $acc3,$acc3,$t2 | |
| 1387 | adc $acc4,$acc4,xzr | |
| 1388 | mov $acc5,xzr | |
| 1389 | ___ | |
| 1390 | for ($i=1;$i<4;$i++) { | |
| 1391 | ################################################################ | |
| 1392 | # ffff0000.ffffffff.yyyyyyyy.zzzzzzzz | |
| 1393 | # * abcdefgh | |
| 1394 | # + xxxxxxxx.xxxxxxxx.xxxxxxxx.xxxxxxxx.xxxxxxxx | |
| 1395 | # | |
| 1396 | # Now observing that ff..ff*x = (2^n-1)*x = 2^n*x-x, we | |
| 1397 | # rewrite above as: | |
| 1398 | # | |
| 1399 | # xxxxxxxx.xxxxxxxx.xxxxxxxx.xxxxxxxx.xxxxxxxx | |
| 1400 | # - 0000abcd.efgh0000.abcdefgh.00000000.00000000 | |
| 1401 | # + abcdefgh.abcdefgh.yzayzbyz.cyzdyzey.zfyzgyzh | |
| 1402 | $code.=<<___; | |
| 1403 | ldr $bi,[$bp,#8*$i] // b[i] | |
| 1404 | ||
| 1405 | lsl $t0,$t4,#32 | |
| 1406 | subs $acc2,$acc2,$t4 | |
| 1407 | lsr $t1,$t4,#32 | |
| 1408 | sbcs $acc3,$acc3,$t0 | |
| 1409 | sbcs $acc4,$acc4,$t1 | |
| 1410 | sbc $acc5,$acc5,xzr | |
| 1411 | ||
| 1412 | subs xzr,$acc0,#1 | |
| 1413 | umulh $t1,$ord0,$t4 | |
| 1414 | mul $t2,$ord1,$t4 | |
| 1415 | umulh $t3,$ord1,$t4 | |
| 1416 | ||
| 1417 | adcs $t2,$t2,$t1 | |
| 1418 | mul $t0,$a0,$bi | |
| 1419 | adc $t3,$t3,xzr | |
| 1420 | mul $t1,$a1,$bi | |
| 1421 | ||
| 1422 | adds $acc0,$acc1,$t2 | |
| 1423 | mul $t2,$a2,$bi | |
| 1424 | adcs $acc1,$acc2,$t3 | |
| 1425 | mul $t3,$a3,$bi | |
| 1426 | adcs $acc2,$acc3,$t4 | |
| 1427 | adcs $acc3,$acc4,$t4 | |
| 1428 | adc $acc4,$acc5,xzr | |
| 1429 | ||
| 1430 | adds $acc0,$acc0,$t0 // accumulate low parts | |
| 1431 | umulh $t0,$a0,$bi | |
| 1432 | adcs $acc1,$acc1,$t1 | |
| 1433 | umulh $t1,$a1,$bi | |
| 1434 | adcs $acc2,$acc2,$t2 | |
| 1435 | umulh $t2,$a2,$bi | |
| 1436 | adcs $acc3,$acc3,$t3 | |
| 1437 | umulh $t3,$a3,$bi | |
| 1438 | adc $acc4,$acc4,xzr | |
| 1439 | mul $t4,$acc0,$ordk | |
| 1440 | adds $acc1,$acc1,$t0 // accumulate high parts | |
| 1441 | adcs $acc2,$acc2,$t1 | |
| 1442 | adcs $acc3,$acc3,$t2 | |
| 1443 | adcs $acc4,$acc4,$t3 | |
| 1444 | adc $acc5,xzr,xzr | |
| 1445 | ___ | |
| 1446 | } | |
| 1447 | $code.=<<___; | |
| 1448 | lsl $t0,$t4,#32 // last reduction | |
| 1449 | subs $acc2,$acc2,$t4 | |
| 1450 | lsr $t1,$t4,#32 | |
| 1451 | sbcs $acc3,$acc3,$t0 | |
| 1452 | sbcs $acc4,$acc4,$t1 | |
| 1453 | sbc $acc5,$acc5,xzr | |
| 1454 | ||
| 1455 | subs xzr,$acc0,#1 | |
| 1456 | umulh $t1,$ord0,$t4 | |
| 1457 | mul $t2,$ord1,$t4 | |
| 1458 | umulh $t3,$ord1,$t4 | |
| 1459 | ||
| 1460 | adcs $t2,$t2,$t1 | |
| 1461 | adc $t3,$t3,xzr | |
| 1462 | ||
| 1463 | adds $acc0,$acc1,$t2 | |
| 1464 | adcs $acc1,$acc2,$t3 | |
| 1465 | adcs $acc2,$acc3,$t4 | |
| 1466 | adcs $acc3,$acc4,$t4 | |
| 1467 | adc $acc4,$acc5,xzr | |
| 1468 | ||
| 1469 | subs $t0,$acc0,$ord0 // ret -= modulus | |
| 1470 | sbcs $t1,$acc1,$ord1 | |
| 1471 | sbcs $t2,$acc2,$ord2 | |
| 1472 | sbcs $t3,$acc3,$ord3 | |
| 1473 | sbcs xzr,$acc4,xzr | |
| 1474 | ||
| 1475 | csel $acc0,$acc0,$t0,lo // ret = borrow ? ret : ret-modulus | |
| 1476 | csel $acc1,$acc1,$t1,lo | |
| 1477 | csel $acc2,$acc2,$t2,lo | |
| 1478 | stp $acc0,$acc1,[$rp] | |
| 1479 | csel $acc3,$acc3,$t3,lo | |
| 1480 | stp $acc2,$acc3,[$rp,#16] | |
| 1481 | ||
| 1482 | ldp x19,x20,[sp,#16] | |
| 1483 | ldp x21,x22,[sp,#32] | |
| 1484 | ldp x23,x24,[sp,#48] | |
| 1485 | ldr x29,[sp],#64 | |
| 1486 | ret | |
| 1487 | .size ecp_nistz256_ord_mul_mont,.-ecp_nistz256_ord_mul_mont | |
| 1488 | ||
| 1489 | //////////////////////////////////////////////////////////////////////// | |
| 1490 | // void ecp_nistz256_ord_sqr_mont(uint64_t res[4], uint64_t a[4], | |
| 15972296 | 1491 | // uint64_t rep); |
| ab4f2026 AP |
1492 | .globl ecp_nistz256_ord_sqr_mont |
| 1493 | .type ecp_nistz256_ord_sqr_mont,%function | |
| 1494 | .align 4 | |
| 1495 | ecp_nistz256_ord_sqr_mont: | |
| 1496 | stp x29,x30,[sp,#-64]! | |
| 1497 | add x29,sp,#0 | |
| 1498 | stp x19,x20,[sp,#16] | |
| 1499 | stp x21,x22,[sp,#32] | |
| 1500 | stp x23,x24,[sp,#48] | |
| 1501 | ||
| 1502 | adr $ordk,.Lord | |
| 1503 | ldp $a0,$a1,[$ap] | |
| 1504 | ldp $a2,$a3,[$ap,#16] | |
| 1505 | ||
| 1506 | ldp $ord0,$ord1,[$ordk,#0] | |
| 1507 | ldp $ord2,$ord3,[$ordk,#16] | |
| 1508 | ldr $ordk,[$ordk,#32] | |
| 1509 | b .Loop_ord_sqr | |
| 1510 | ||
| 1511 | .align 4 | |
| 1512 | .Loop_ord_sqr: | |
| 1513 | sub $bp,$bp,#1 | |
| 1514 | //////////////////////////////////////////////////////////////// | |
| 1515 | // | | | | | |a1*a0| | | |
| 1516 | // | | | | |a2*a0| | | | |
| 1517 | // | |a3*a2|a3*a0| | | | | |
| 1518 | // | | | |a2*a1| | | | | |
| 1519 | // | | |a3*a1| | | | | | |
| 1520 | // *| | | | | | | | 2| | |
| 1521 | // +|a3*a3|a2*a2|a1*a1|a0*a0| | |
| 1522 | // |--+--+--+--+--+--+--+--| | |
| 1523 | // |A7|A6|A5|A4|A3|A2|A1|A0|, where Ax is $accx, i.e. follow $accx | |
| 1524 | // | |
| 1525 | // "can't overflow" below mark carrying into high part of | |
| 1526 | // multiplication result, which can't overflow, because it | |
| 1527 | // can never be all ones. | |
| 1528 | ||
| 1529 | mul $acc1,$a1,$a0 // a[1]*a[0] | |
| 1530 | umulh $t1,$a1,$a0 | |
| 1531 | mul $acc2,$a2,$a0 // a[2]*a[0] | |
| 1532 | umulh $t2,$a2,$a0 | |
| 1533 | mul $acc3,$a3,$a0 // a[3]*a[0] | |
| 1534 | umulh $acc4,$a3,$a0 | |
| 1535 | ||
| 1536 | adds $acc2,$acc2,$t1 // accumulate high parts of multiplication | |
| 1537 | mul $t0,$a2,$a1 // a[2]*a[1] | |
| 1538 | umulh $t1,$a2,$a1 | |
| 1539 | adcs $acc3,$acc3,$t2 | |
| 1540 | mul $t2,$a3,$a1 // a[3]*a[1] | |
| 1541 | umulh $t3,$a3,$a1 | |
| 1542 | adc $acc4,$acc4,xzr // can't overflow | |
| 1543 | ||
| 1544 | mul $acc5,$a3,$a2 // a[3]*a[2] | |
| 1545 | umulh $acc6,$a3,$a2 | |
| 1546 | ||
| 1547 | adds $t1,$t1,$t2 // accumulate high parts of multiplication | |
| 1548 | mul $acc0,$a0,$a0 // a[0]*a[0] | |
| 1549 | adc $t2,$t3,xzr // can't overflow | |
| 1550 | ||
| 1551 | adds $acc3,$acc3,$t0 // accumulate low parts of multiplication | |
| 1552 | umulh $a0,$a0,$a0 | |
| 1553 | adcs $acc4,$acc4,$t1 | |
| 1554 | mul $t1,$a1,$a1 // a[1]*a[1] | |
| 1555 | adcs $acc5,$acc5,$t2 | |
| 1556 | umulh $a1,$a1,$a1 | |
| 1557 | adc $acc6,$acc6,xzr // can't overflow | |
| 1558 | ||
| 1559 | adds $acc1,$acc1,$acc1 // acc[1-6]*=2 | |
| 1560 | mul $t2,$a2,$a2 // a[2]*a[2] | |
| 1561 | adcs $acc2,$acc2,$acc2 | |
| 1562 | umulh $a2,$a2,$a2 | |
| 1563 | adcs $acc3,$acc3,$acc3 | |
| 1564 | mul $t3,$a3,$a3 // a[3]*a[3] | |
| 1565 | adcs $acc4,$acc4,$acc4 | |
| 1566 | umulh $a3,$a3,$a3 | |
| 1567 | adcs $acc5,$acc5,$acc5 | |
| 1568 | adcs $acc6,$acc6,$acc6 | |
| 1569 | adc $acc7,xzr,xzr | |
| 1570 | ||
| 1571 | adds $acc1,$acc1,$a0 // +a[i]*a[i] | |
| 1572 | mul $t4,$acc0,$ordk | |
| 1573 | adcs $acc2,$acc2,$t1 | |
| 1574 | adcs $acc3,$acc3,$a1 | |
| 1575 | adcs $acc4,$acc4,$t2 | |
| 1576 | adcs $acc5,$acc5,$a2 | |
| 1577 | adcs $acc6,$acc6,$t3 | |
| 1578 | adc $acc7,$acc7,$a3 | |
| 1579 | ___ | |
| 1580 | for($i=0; $i<4; $i++) { # reductions | |
| 1581 | $code.=<<___; | |
| 1582 | subs xzr,$acc0,#1 | |
| 1583 | umulh $t1,$ord0,$t4 | |
| 1584 | mul $t2,$ord1,$t4 | |
| 1585 | umulh $t3,$ord1,$t4 | |
| 1586 | ||
| 1587 | adcs $t2,$t2,$t1 | |
| 1588 | adc $t3,$t3,xzr | |
| 1589 | ||
| 1590 | adds $acc0,$acc1,$t2 | |
| 1591 | adcs $acc1,$acc2,$t3 | |
| 1592 | adcs $acc2,$acc3,$t4 | |
| 1593 | adc $acc3,xzr,$t4 // can't overflow | |
| 1594 | ___ | |
| 1595 | $code.=<<___ if ($i<3); | |
| 1596 | mul $t3,$acc0,$ordk | |
| 1597 | ___ | |
| 1598 | $code.=<<___; | |
| 1599 | lsl $t0,$t4,#32 | |
| 1600 | subs $acc1,$acc1,$t4 | |
| 1601 | lsr $t1,$t4,#32 | |
| 1602 | sbcs $acc2,$acc2,$t0 | |
| 1603 | sbc $acc3,$acc3,$t1 // can't borrow | |
| 1604 | ___ | |
| 1605 | ($t3,$t4) = ($t4,$t3); | |
| 1606 | } | |
| 1607 | $code.=<<___; | |
| 1608 | adds $acc0,$acc0,$acc4 // accumulate upper half | |
| 1609 | adcs $acc1,$acc1,$acc5 | |
| 1610 | adcs $acc2,$acc2,$acc6 | |
| 1611 | adcs $acc3,$acc3,$acc7 | |
| 1612 | adc $acc4,xzr,xzr | |
| 1613 | ||
| 1614 | subs $t0,$acc0,$ord0 // ret -= modulus | |
| 1615 | sbcs $t1,$acc1,$ord1 | |
| 1616 | sbcs $t2,$acc2,$ord2 | |
| 1617 | sbcs $t3,$acc3,$ord3 | |
| 1618 | sbcs xzr,$acc4,xzr | |
| 1619 | ||
| 1620 | csel $a0,$acc0,$t0,lo // ret = borrow ? ret : ret-modulus | |
| 1621 | csel $a1,$acc1,$t1,lo | |
| 1622 | csel $a2,$acc2,$t2,lo | |
| 1623 | csel $a3,$acc3,$t3,lo | |
| 1624 | ||
| 1625 | cbnz $bp,.Loop_ord_sqr | |
| 1626 | ||
| 1627 | stp $a0,$a1,[$rp] | |
| 1628 | stp $a2,$a3,[$rp,#16] | |
| 1629 | ||
| 1630 | ldp x19,x20,[sp,#16] | |
| 1631 | ldp x21,x22,[sp,#32] | |
| 1632 | ldp x23,x24,[sp,#48] | |
| 1633 | ldr x29,[sp],#64 | |
| 1634 | ret | |
| 1635 | .size ecp_nistz256_ord_sqr_mont,.-ecp_nistz256_ord_sqr_mont | |
| 1636 | ___ | |
| e1613e7c AP |
1637 | } } |
| 1638 | ||
| 1639 | ######################################################################## | |
| 1640 | # scatter-gather subroutines | |
| 1641 | { | |
| 1642 | my ($out,$inp,$index,$mask)=map("x$_",(0..3)); | |
| 1643 | $code.=<<___; | |
| 1644 | // void ecp_nistz256_scatter_w5(void *x0,const P256_POINT *x1, | |
| 1645 | // int x2); | |
| 1646 | .globl ecp_nistz256_scatter_w5 | |
| 1647 | .type ecp_nistz256_scatter_w5,%function | |
| 1648 | .align 4 | |
| 1649 | ecp_nistz256_scatter_w5: | |
| 1650 | stp x29,x30,[sp,#-16]! | |
| 1651 | add x29,sp,#0 | |
| 1652 | ||
| 1653 | add $out,$out,$index,lsl#2 | |
| 1654 | ||
| 1655 | ldp x4,x5,[$inp] // X | |
| 1656 | ldp x6,x7,[$inp,#16] | |
| db42bb44 | 1657 | stur w4,[$out,#64*0-4] |
| e1613e7c AP |
1658 | lsr x4,x4,#32 |
| 1659 | str w5,[$out,#64*1-4] | |
| 1660 | lsr x5,x5,#32 | |
| 1661 | str w6,[$out,#64*2-4] | |
| 1662 | lsr x6,x6,#32 | |
| 1663 | str w7,[$out,#64*3-4] | |
| 1664 | lsr x7,x7,#32 | |
| 1665 | str w4,[$out,#64*4-4] | |
| 1666 | str w5,[$out,#64*5-4] | |
| 1667 | str w6,[$out,#64*6-4] | |
| 1668 | str w7,[$out,#64*7-4] | |
| 1669 | add $out,$out,#64*8 | |
| 1670 | ||
| 1671 | ldp x4,x5,[$inp,#32] // Y | |
| 1672 | ldp x6,x7,[$inp,#48] | |
| db42bb44 | 1673 | stur w4,[$out,#64*0-4] |
| e1613e7c AP |
1674 | lsr x4,x4,#32 |
| 1675 | str w5,[$out,#64*1-4] | |
| 1676 | lsr x5,x5,#32 | |
| 1677 | str w6,[$out,#64*2-4] | |
| 1678 | lsr x6,x6,#32 | |
| 1679 | str w7,[$out,#64*3-4] | |
| 1680 | lsr x7,x7,#32 | |
| 1681 | str w4,[$out,#64*4-4] | |
| 1682 | str w5,[$out,#64*5-4] | |
| 1683 | str w6,[$out,#64*6-4] | |
| 1684 | str w7,[$out,#64*7-4] | |
| 1685 | add $out,$out,#64*8 | |
| 1686 | ||
| 1687 | ldp x4,x5,[$inp,#64] // Z | |
| 1688 | ldp x6,x7,[$inp,#80] | |
| db42bb44 | 1689 | stur w4,[$out,#64*0-4] |
| e1613e7c AP |
1690 | lsr x4,x4,#32 |
| 1691 | str w5,[$out,#64*1-4] | |
| 1692 | lsr x5,x5,#32 | |
| 1693 | str w6,[$out,#64*2-4] | |
| 1694 | lsr x6,x6,#32 | |
| 1695 | str w7,[$out,#64*3-4] | |
| 1696 | lsr x7,x7,#32 | |
| 1697 | str w4,[$out,#64*4-4] | |
| 1698 | str w5,[$out,#64*5-4] | |
| 1699 | str w6,[$out,#64*6-4] | |
| 1700 | str w7,[$out,#64*7-4] | |
| 1701 | ||
| 1702 | ldr x29,[sp],#16 | |
| 1703 | ret | |
| 1704 | .size ecp_nistz256_scatter_w5,.-ecp_nistz256_scatter_w5 | |
| 1705 | ||
| 1706 | // void ecp_nistz256_gather_w5(P256_POINT *x0,const void *x1, | |
| 1707 | // int x2); | |
| 1708 | .globl ecp_nistz256_gather_w5 | |
| 1709 | .type ecp_nistz256_gather_w5,%function | |
| 1710 | .align 4 | |
| 1711 | ecp_nistz256_gather_w5: | |
| 1712 | stp x29,x30,[sp,#-16]! | |
| 1713 | add x29,sp,#0 | |
| 1714 | ||
| 1715 | cmp $index,xzr | |
| 1716 | csetm x3,ne | |
| 1717 | add $index,$index,x3 | |
| 1718 | add $inp,$inp,$index,lsl#2 | |
| 1719 | ||
| 1720 | ldr w4,[$inp,#64*0] | |
| 1721 | ldr w5,[$inp,#64*1] | |
| 1722 | ldr w6,[$inp,#64*2] | |
| 1723 | ldr w7,[$inp,#64*3] | |
| 1724 | ldr w8,[$inp,#64*4] | |
| 1725 | ldr w9,[$inp,#64*5] | |
| 1726 | ldr w10,[$inp,#64*6] | |
| 1727 | ldr w11,[$inp,#64*7] | |
| 1728 | add $inp,$inp,#64*8 | |
| 1729 | orr x4,x4,x8,lsl#32 | |
| 1730 | orr x5,x5,x9,lsl#32 | |
| 1731 | orr x6,x6,x10,lsl#32 | |
| 1732 | orr x7,x7,x11,lsl#32 | |
| 1733 | csel x4,x4,xzr,ne | |
| 1734 | csel x5,x5,xzr,ne | |
| 1735 | csel x6,x6,xzr,ne | |
| 1736 | csel x7,x7,xzr,ne | |
| 1737 | stp x4,x5,[$out] // X | |
| 1738 | stp x6,x7,[$out,#16] | |
| 1739 | ||
| 1740 | ldr w4,[$inp,#64*0] | |
| 1741 | ldr w5,[$inp,#64*1] | |
| 1742 | ldr w6,[$inp,#64*2] | |
| 1743 | ldr w7,[$inp,#64*3] | |
| 1744 | ldr w8,[$inp,#64*4] | |
| 1745 | ldr w9,[$inp,#64*5] | |
| 1746 | ldr w10,[$inp,#64*6] | |
| 1747 | ldr w11,[$inp,#64*7] | |
| 1748 | add $inp,$inp,#64*8 | |
| 1749 | orr x4,x4,x8,lsl#32 | |
| 1750 | orr x5,x5,x9,lsl#32 | |
| 1751 | orr x6,x6,x10,lsl#32 | |
| 1752 | orr x7,x7,x11,lsl#32 | |
| 1753 | csel x4,x4,xzr,ne | |
| 1754 | csel x5,x5,xzr,ne | |
| 1755 | csel x6,x6,xzr,ne | |
| 1756 | csel x7,x7,xzr,ne | |
| 1757 | stp x4,x5,[$out,#32] // Y | |
| 1758 | stp x6,x7,[$out,#48] | |
| 1759 | ||
| 1760 | ldr w4,[$inp,#64*0] | |
| 1761 | ldr w5,[$inp,#64*1] | |
| 1762 | ldr w6,[$inp,#64*2] | |
| 1763 | ldr w7,[$inp,#64*3] | |
| 1764 | ldr w8,[$inp,#64*4] | |
| 1765 | ldr w9,[$inp,#64*5] | |
| 1766 | ldr w10,[$inp,#64*6] | |
| 1767 | ldr w11,[$inp,#64*7] | |
| 1768 | orr x4,x4,x8,lsl#32 | |
| 1769 | orr x5,x5,x9,lsl#32 | |
| 1770 | orr x6,x6,x10,lsl#32 | |
| 1771 | orr x7,x7,x11,lsl#32 | |
| 1772 | csel x4,x4,xzr,ne | |
| 1773 | csel x5,x5,xzr,ne | |
| 1774 | csel x6,x6,xzr,ne | |
| 1775 | csel x7,x7,xzr,ne | |
| 1776 | stp x4,x5,[$out,#64] // Z | |
| 1777 | stp x6,x7,[$out,#80] | |
| 1778 | ||
| 1779 | ldr x29,[sp],#16 | |
| 1780 | ret | |
| 1781 | .size ecp_nistz256_gather_w5,.-ecp_nistz256_gather_w5 | |
| 1782 | ||
| 1783 | // void ecp_nistz256_scatter_w7(void *x0,const P256_POINT_AFFINE *x1, | |
| 1784 | // int x2); | |
| 1785 | .globl ecp_nistz256_scatter_w7 | |
| 1786 | .type ecp_nistz256_scatter_w7,%function | |
| 1787 | .align 4 | |
| 1788 | ecp_nistz256_scatter_w7: | |
| 1789 | stp x29,x30,[sp,#-16]! | |
| 1790 | add x29,sp,#0 | |
| 1791 | ||
| 1792 | add $out,$out,$index | |
| 1793 | mov $index,#64/8 | |
| 1794 | .Loop_scatter_w7: | |
| 1795 | ldr x3,[$inp],#8 | |
| 1796 | subs $index,$index,#1 | |
| 1797 | prfm pstl1strm,[$out,#4096+64*0] | |
| 1798 | prfm pstl1strm,[$out,#4096+64*1] | |
| 1799 | prfm pstl1strm,[$out,#4096+64*2] | |
| 1800 | prfm pstl1strm,[$out,#4096+64*3] | |
| 1801 | prfm pstl1strm,[$out,#4096+64*4] | |
| 1802 | prfm pstl1strm,[$out,#4096+64*5] | |
| 1803 | prfm pstl1strm,[$out,#4096+64*6] | |
| 1804 | prfm pstl1strm,[$out,#4096+64*7] | |
| 87a75b3e | 1805 | strb w3,[$out,#64*0] |
| e1613e7c | 1806 | lsr x3,x3,#8 |
| 87a75b3e | 1807 | strb w3,[$out,#64*1] |
| e1613e7c | 1808 | lsr x3,x3,#8 |
| 87a75b3e | 1809 | strb w3,[$out,#64*2] |
| e1613e7c | 1810 | lsr x3,x3,#8 |
| 87a75b3e | 1811 | strb w3,[$out,#64*3] |
| e1613e7c | 1812 | lsr x3,x3,#8 |
| 87a75b3e | 1813 | strb w3,[$out,#64*4] |
| e1613e7c | 1814 | lsr x3,x3,#8 |
| 87a75b3e | 1815 | strb w3,[$out,#64*5] |
| e1613e7c | 1816 | lsr x3,x3,#8 |
| 87a75b3e | 1817 | strb w3,[$out,#64*6] |
| e1613e7c | 1818 | lsr x3,x3,#8 |
| 87a75b3e | 1819 | strb w3,[$out,#64*7] |
| e1613e7c AP |
1820 | add $out,$out,#64*8 |
| 1821 | b.ne .Loop_scatter_w7 | |
| 1822 | ||
| 1823 | ldr x29,[sp],#16 | |
| 1824 | ret | |
| 1825 | .size ecp_nistz256_scatter_w7,.-ecp_nistz256_scatter_w7 | |
| 1826 | ||
| 1827 | // void ecp_nistz256_gather_w7(P256_POINT_AFFINE *x0,const void *x1, | |
| 1828 | // int x2); | |
| 1829 | .globl ecp_nistz256_gather_w7 | |
| 1830 | .type ecp_nistz256_gather_w7,%function | |
| 1831 | .align 4 | |
| 1832 | ecp_nistz256_gather_w7: | |
| 1833 | stp x29,x30,[sp,#-16]! | |
| 1834 | add x29,sp,#0 | |
| 1835 | ||
| 1836 | cmp $index,xzr | |
| 1837 | csetm x3,ne | |
| 1838 | add $index,$index,x3 | |
| 1839 | add $inp,$inp,$index | |
| 1840 | mov $index,#64/8 | |
| 1841 | nop | |
| 1842 | .Loop_gather_w7: | |
| 1843 | ldrb w4,[$inp,#64*0] | |
| 1844 | prfm pldl1strm,[$inp,#4096+64*0] | |
| 1845 | subs $index,$index,#1 | |
| 1846 | ldrb w5,[$inp,#64*1] | |
| 1847 | prfm pldl1strm,[$inp,#4096+64*1] | |
| 1848 | ldrb w6,[$inp,#64*2] | |
| 1849 | prfm pldl1strm,[$inp,#4096+64*2] | |
| 1850 | ldrb w7,[$inp,#64*3] | |
| 1851 | prfm pldl1strm,[$inp,#4096+64*3] | |
| 1852 | ldrb w8,[$inp,#64*4] | |
| 1853 | prfm pldl1strm,[$inp,#4096+64*4] | |
| 1854 | ldrb w9,[$inp,#64*5] | |
| 1855 | prfm pldl1strm,[$inp,#4096+64*5] | |
| 1856 | ldrb w10,[$inp,#64*6] | |
| 1857 | prfm pldl1strm,[$inp,#4096+64*6] | |
| 1858 | ldrb w11,[$inp,#64*7] | |
| 1859 | prfm pldl1strm,[$inp,#4096+64*7] | |
| 1860 | add $inp,$inp,#64*8 | |
| 1861 | orr x4,x4,x5,lsl#8 | |
| 1862 | orr x6,x6,x7,lsl#8 | |
| 1863 | orr x8,x8,x9,lsl#8 | |
| 1864 | orr x4,x4,x6,lsl#16 | |
| 1865 | orr x10,x10,x11,lsl#8 | |
| 1866 | orr x4,x4,x8,lsl#32 | |
| 1867 | orr x4,x4,x10,lsl#48 | |
| 1868 | and x4,x4,x3 | |
| 1869 | str x4,[$out],#8 | |
| 1870 | b.ne .Loop_gather_w7 | |
| 1871 | ||
| 1872 | ldr x29,[sp],#16 | |
| 1873 | ret | |
| 1874 | .size ecp_nistz256_gather_w7,.-ecp_nistz256_gather_w7 | |
| 1875 | ___ | |
| 1876 | } | |
| 1877 | ||
| 1878 | foreach (split("\n",$code)) { | |
| 1879 | s/\`([^\`]*)\`/eval $1/ge; | |
| 1880 | ||
| 1881 | print $_,"\n"; | |
| 1882 | } | |
| 1883 | close STDOUT; # enforce flush |